Chapter 18 Reliability 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.

Reliability Reliability equals consistency Probability an item performs a required function Under specific conditions Specified amount of time According to intended design Detect and resolve problems 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.

Reliability Two approaches Whole airline operation Dispatch reliability Achieve on-time departures Delays Maintenance Flight operations ATC Overlook maintenance that do not cause delays Do not track/investigate Maintenance operation (M&E) According to intended design 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.

Reliability Two approaches Maintenance operation Address problems of maintenance Whether or not delays or caused Provide analysis/corrective actions 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.

Reliability Types Statistical reliability Collection/analysis of data (events) Failure, removal, repair rates Events per 1000 flight hours/per 100 flight cycles Not always appropriate Not enough data points Valid approach (p. 219) 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.

Reliability Types Historical reliability Comparison of current event rates to past event rates Not always appropriate New equipment introduced Can be used to establish statistical program 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.

Reliability Types Event-oriented reliability One-time events (not on daily basis) Bird strikes In-flight engine shutdowns Lightning strikes Accidents/incidents ETOPS (probably in statistical/historical also) 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.

Reliability Types Dispatch reliability Measure of overall effectiveness In relation to on-time departures Based on 100 flights (percentage) Should look at whole operation Airlines may not track problems not causing delays Airline procedures may need adjusting Page 221/222 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.

Reliability Rules/practices to manage/control maintenance program Monitor performance Vehicles Equipment Call attention for needed corrective action Monitor effectiveness of corrective actions Justify adjusting maintenance program 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.

Reliability Elements of program Data collection Problem area alerting Data display Data analysis Corrective actions Follow-up analysis Monthly report 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.

Data Collection Elements of program Flight time/cycles per aircraft Cancellations/delays over 15 minutes Unscheduled component removals Unscheduled engine removals In-flight engine shutdowns Pilot reports/logbook write-ups Cabin logbook write-ups Component failures Maintenance check package findings Critical failures 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.

Problem Detection Alerting system Performance significantly different from normal Need to understand equipment Know failure patterns Setting alert levels Set to useable level Indicate problem exists or may be developing Know when to proceed or refrain from investigating Alert levels recalculated yearly 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.

Data Display Tabular or graph data Tabular Graph Compare event rates with other data Graph View month to month performance Show increasing/decreasing rates 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.

Data Analysis Preliminary Analysis Item goes on alert status Determine if alert is valid Sent to engineering for detailed analysis Troubleshoot Determine required action Issue EO 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.

Corrective Action Results Modification of equipment Change/correct line, hangar, shop processes/practices Disposal of defective parts Training of mechanics Addition of maintenance tasks to program Decrease in maintenance intervals Corrective action to be completed within 1 month of EO issue 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.

Follow-up Analysis Action Verify corrective action effective No improvement – back on alert status Data analysis repeated 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.

Data Reporting Monthly report What problems are encountered What is being done Concentrate on items Just gone on alert Under investigation Completed corrective actions Progress on other items 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.

Additional Functions Provide changes to program Specific tasks Adjustments in intervals to tasks Processes Works with MPRB 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.

MPRB Meets monthly - discuss Overall status of maintenance reliability Items on alert Establishment of alert levels Adjustment of the alert levels Works with MPRB 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.