1. Chapter 1 Why We Have to do Maintenance
Introduction
World War II involved specialized aircraft produced in large numbers by various combatant nations, and many makes of familiar names domestically became known internationally.
WWI spurred acft production, the acft were not available in the beginning of the war.
There were many efforts to prevent war, but the militaristic goals of a few countries pulled other countries into conflict.
WWII was worldwide with concentrations of fighting in Europe and the Pacific.
Hitler wanted to acquired more living space which he tried to do by taking starting war with other countries.

2. Provides assurance Flight Safety Reliability Airworthiness
Why Maintenance
Provides assurance
Flight Safety
Reliability
Airworthiness
Introduction
World War II involved specialized aircraft produced in large numbers by various combatant nations, and many makes of familiar names domestically became known internationally.
WWI spurred acft production, the acft were not available in the beginning of the war.
There were many efforts to prevent war, but the militaristic goals of a few countries pulled other countries into conflict.
WWII was worldwide with concentrations of fighting in Europe and the Pacific.
Hitler wanted to acquired more living space which he tried to do by taking starting war with other countries.

3. Engineer’s Role Designer Design best possible product
May be limited by
Money
Ability
Technique
Man-made entropy
Final design may not be optimum
Reduced tolerances, cheaper materials
Requires additional maintenance
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

4. Mechanic Role Technician Repairer Maintainer
Goal: Combat natural entropy in systems/components
Deterioration
Misuse
Remove/replace parts
Troubleshoot
Restore systems to intended use
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

5. Maintenance Two types Preventive maintenance (scheduled)
Prevent deterioration of system to unusable level
Corrective actions
Reduce entropy to original level
Regular intervals
Various intervals
Daily
Number of flights
Flight hours
Cycles
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

6. Maintenance Two types Unscheduled maintenance
System breaks rapidly
System breaks completely
Definitive, extensive troubleshooting
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

7. Maintenance Reliability
Level of perfection
Inherent reliability
Maintenance cannot increase level of reliability above this reliability
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

8. Redesign Level of perfection increase Natural entropy is reduced
Material change
New materials
New techniques
New components
Man-made change
Tighter tolerances
Improved design skills
Design philosophy
Natural entropy is reduced
Maintenance schedule will adjust
May increase or decrease schedule
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

9. Failure Rate Different patterns of failure Curve A Early failures
Poor design
Improper parts
Incorrect usage
Failure rate levels off
Physical limit/wears out
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

10. Failure Rate Different patterns of failure Curve B
Slightly rising rate
Definite wear-out period at end
Physical limit/wears out
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

11. Failure Rate Different patterns of failure Curve C
Slightly rising rate
No infant mortality or wear-out period
Becomes unusable
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

12. Failure Rate Different patterns of failure Curve D
Slow failure rate when new
Rises quickly after break-in period
Steady level through rest of life
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

13. Failure Rate Different patterns of failure Curve E
Steady or slightly rising failure rate
No infant mortality or wear-out period
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

14. Failure Rate Different patterns of failure Curve F Infant mortality
Level
No wear-out period
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

15. Maintenance Systemic approach Management techniques
Reduce peak periods of unscheduled maintenance
Management techniques
Equipment techniques
Line replaceable units
Minimum aircraft dispatch requirements
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

16. Redundancy Higher desired reliability Primaries and backups
Primary fails – backup takes over function
Radios
Various maintenance techniques possible
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

17. Line Replaceable Unit (LPU)
Quick replacement
No undue maintenance delays
Failed part
Discarded
Repaired
No further delay to flight
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

18. Minimum Equipment List (MEL)
Loss of functionality
Does not effect safety or operation of flight
Manufacturer determined
Regulatory sanctioned
Deferral of maintenance without upsetting mission requirements
Maintenance performed within specific time guidelines
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

19. Guides Dispatch Deviation Guide (DDG)
Instructions for line maintenance
Capping connectors from removed units
Circuit breakers
Prevent inadvertent power-up of specific equipment
Configuration Deviation List (CDL)
Configuration differences not affecting safety
Certain panels missing
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

20. Guides Non-essential Equipment & Furnishing (NEF)
Do not affect airworthiness
Part of MEL system
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

21. Maintenance Program Scheduled Maintenance/Servicing Overall goal
Ensure designed level of perfection (Reliability)
Components/systems fail in different ways/rates
Leads to unscheduled maintenance
Overall goal
Smooth workload and manpower requirements
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.

22. Maintenance Program Inspections/Modifications dictated by
Aviation regulators
Manufacturers
Airline
Airline maintenance
Programs vary according to operator and activities
Poland Falls: The German invasion of Poland began on 1 September 1939, concluded with Poland’s surrender a month later, and demonstrated Germany’s use of aircraft to destroy a country’s air combat capabilities early during an assault — a tactic Germany used repeatedly in its effort to make Europe German by capturing countries one by one. Blitzkrieg – lightning war, fast moving assaults using infantry and tanks supported by acft.
The Phony War: The winter of provided a lull in the fighting and grounded many aircraft.
Winter War: The Soviet invasion of Finland and the subsequent Winter War between two neighbors of vastly different sizes demonstrated that attrition of a combatant’s resources, not absolute numbers of wins and losses, could determine the outcome of combat. WX restricted aerial operations. The Polish army was not prepared to fight.
The Battle for France: Belgium and Holland were in Germany’s way around the northwestern end of France’s fortified Maginot Line, so the German Luftwaffe (Air Force) bombed Belgium and Dutch as well as French airfields and planes on the ground and German pilots fought particularly French and British aircraft in the air.
Dunkirk: Pushed to the sea (the English Channel) by advancing German forces, the British Expeditionary Force and France’s Northern Army evacuated 300,000 men from Dunkirk to the safety of England across the channel — under the aerial protection of British Spitfires and other fighter planes. Germany won the battle over Dunkirk in terms of fighter stats. Germany flew 2,000 sorties and lost 37 acft, British flew 1,764 sorties & lost 106 acft.
Mediterranean Region: Concurrent with the Battle for France, Germany launched a major paratroop attack against Crete, and Italy joined Germany in the fighting to conquer enemy lands in the Mediterranean region.
French Governments: After the fall of France in June 1942, the French government became scattered governments: There was German-ruled “occupied France,” and south of that was authoritarian “Vichy France,” and throughout France there was a “resistance” movement, also south of the Mediterranean Sea were “Free French” colonies in Africa led by General Charles de Gualle who was in exile in Great Britain.
Battle of Britain: The Battle of Britain was an air battle preliminary to a German invasion that never happened because the Royal Air Force escaped destruction on the ground and fought an effective defensive battle against Luftwaffe bombers, fighters, and blitz tactics. Britain had radar to guide airplanes from the ground.
Battle of the Atlantic: The maritime battle of the Atlantic employed aircraft in reconnaissance, fighter, torpedo bomber, and other roles.
Sortie – one mission by a single military plane.
The German Luftwaffe was one of the most powerful, doctrinally advanced, and battle experienced air forces in the world when WWII started.