1. T-6B Engine Malfunctions In-Flight
Created: 16 Feb 2016
Updated: 18 Feb 2016
T6BDriver.com

2. Objectives
Be able to properly identify in-flight engine malfunctions to include:
Engine Failure
Uncommanded Propeller Feather
Uncommanded Power Change/Loss of Power
Be able to quickly apply corrective actions for the identified malfunction
Comprehend the purpose of the corrective actions applied
(Utilize engine malfunction in-flight diagram while reviewing this slideshow)

3. Initial Setup This briefing is a technique
Provides a quick, reliable way to identify the different engine malfunctions
Gets rid of time occupiers (Bad indicators / EICAS lights)
Goes straight to problem (Know where to focus)
Practice these on C2201 event
Briefing assumes the first step of any EP (maintain aircraft control) has been completed

4. Point of Origin
Something wrong with engine but unsure of exact problem
Noise/Lack of noise
Deceleration
Vibrations Np Q
Oil P
ITT
Oil T
Engine Problem N1
Hyd

5. Analyze the Situation
Something wrong with engine but unsure of exact problem
Noise/Lack of noise
Deceleration
Vibrations
First place to go is N1/ITT
Indicate core health of engine
Many EICAS distractions N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

6. Analyze the Situation
Something wrong with engine but unsure of exact problem
Noise/Lack of noise
Deceleration
Vibrations
First place to go is N1/ITT
Indicate core health of engine
Many EICAS distractions
2 Possible Scenarios N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

7. Analyze the Situation
Something wrong with engine but unsure of exact problem
Noise/Lack of noise
Deceleration
Vibrations
First place to go is N1/ITT
Indicate core health of engine
Many EICAS distractions
2 Possible Scenarios
N1/ITT are OK (talk about later)
N1/ITT are dropping N1
ITT
N1 ↓
ITT ↓ N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

8. Analyze the Situation (N1/ITT Dropping)
What exactly do you look for?
N1 ↓
ITT ↓ N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

9. Analyze the Situation (N1/ITT Dropping)
What exactly do you look for?
N1/ITT
N1 going below 60%
ITT going below 500°
Engine has dropped below ground Idle conditions
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

10. Analyze the Situation (N1/ITT Dropping)
What exactly do you look for?
N1/ITT
N1 going below 60%
ITT going below 500°
Engine has dropped below Idle conditions
Engine Failure
Engine Failure!!!
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

11. Analyze the Situation (N1/ITT Dropping)
What exactly do you look for?
N1/ITT
N1 going below 60%
ITT going below 500°
Engine has dropped below Idle conditions
NATOPS (Engine Failure)
N1 will indicate 0% within approx. 5 seconds
N1 indicator will not indicate speeds below 8%
Lots of EICAS lights
Prop RPM will be slow or stop
Does not mean engine has frozen/seized
Engine Failure
Engine Failure!!!
Watch Video
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

12. Take Corrective Action (Engine Failure)
Execute Engine Failure Critical Action Items
Zoom Glide – 125 KIAS
Zoom ability is very airspeed dependent
NATOPS (>150 KIAS): 2 G pull to a 20° climb to 145 KIAS then 0.5 G push-over
Exchange airspeed for altitude while turning for airfield (10° nose high)
“Turn, Climb, Clean”
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
The more aggressive the maneuver the more attention must be paid
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

13. Take Corrective Action (Engine Failure)
Execute Engine Failure Critical Action Items
Zoom Glide – 125 KIAS
Zoom ability is very airspeed dependent
NATOPS (>150 KIAS): 2 G pull to a 20° climb to 145 KIAS then 0.5 G push-over
Exchange airspeed for altitude while turning for airfield (10° nose high)
“Turn, Climb, Clean”
PCL – Off
Get prop to feather position
Save energy in zoom
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
NATOPS calls this step critical
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

14. Take Corrective Action (Engine Failure)
Execute Engine Failure Critical Action Items
Zoom Glide – 125 KIAS
Zoom ability is very airspeed dependent
NATOPS (>150 KIAS): 2 G pull to a 20° climb to 145 KIAS then 0.5 G push-over
Exchange airspeed for altitude while turning for airfield (10° nose high)
“Turn, Climb, Clean”
PCL – Off
Get prop to feather position
Save energy in zoom
Intercept ELP
Figure the nearest airfield (should be turning to by now)
Use ½ DME method to figure the required altitude to make airfield (DEGA)
½ DME to airfield + 3,000’ + Elevation
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

15. Take Corrective Action (Engine Failure)
Execute Engine Failure Critical Action Items
Zoom Glide – 125 KIAS
Zoom ability is very airspeed dependent
NATOPS (>150 KIAS): 2 G pull to a 20° climb to 145 KIAS then 0.5 G push-over
Exchange airspeed for altitude while turning for airfield (10° nose high)
“Turn, Climb, Clean”
PCL – Off
Get prop to feather position
Save energy in zoom
Intercept ELP
Figure the nearest airfield (should be turning to by now)
Use ½ DME method to figure the required altitude to make airfield (DEGA)
½ DME to airfield + 3,000’ + Elevation
Airstart – Attempt if warranted (When is that???)
4-Fs (Fire/FOD/Frozen/Fail)
Frozen or Seized – Look at hydraulic pressure (immediate drop to zero = frozen)
Also consider time & altitude (if right on profile altitude)
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
Fire/FOD = Mechanical failures in book
PMU fail? Have to do a PMU off airstart…more laborious and time consuming
Warning about restrart consideration if right on profile altitude
2,000’ controlled ejection
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

16. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Immediate Airstart Critical Action Items
PCL – Off
Should already be in the Off position
Don’t mistake Idle for Off
Immediate Airstart
3-Fs (Fire/FOD/Frozen) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

17. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Immediate Airstart Critical Action Items
PCL – Off
Should already be in the Off position
Don’t mistake Idle for Off
Starter Switch – Auto/Reset
Have to exchange hands on control stick
Immediately after this step, switch right hand back to stick for next step
Immediate Airstart
3-Fs (Fire/FOD/Frozen) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

18. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Immediate Airstart Critical Action Items
PCL – Off
Should already be in the Off position
Don’t mistake Idle for Off
Starter Switch – Auto/Reset
Have to exchange hands on control stick
Immediately after this step, switch right hand back to stick for next step
PCL – Idle above 13% N1
Move “2 clicks” to Idle position
Do not exaggerate this step and push PCL way above Idle
Immediate Airstart
3-Fs (Fire/FOD/Frozen) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

19. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Immediate Airstart Critical Action Items
PCL – Off
Should already be in the Off position
Don’t mistake Idle for Off
Starter Switch – Auto/Reset
Have to exchange hands on control stick
Immediately after this step, switch right hand back to stick for next step
PCL – Idle above 13% N1
Move “2 clicks” to Idle position
Do not exaggerate this step and push PCL way above Idle
Engine Instruments – Monitor ITT, N1, & Oil Pressure
Look for light off on ITT
Monitor for over temp
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

20. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
NATOPS
Airstarts have only been demonstrated at 20,000’ MSL and below
Airspeed KIAS < 15,000’
Airspeed KIAS at 15,001 – 20,000’
Useful power available 40 seconds from starter engagement
Lose 1,200’ of altitude during an airstart
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

21. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
NATOPS
Airstarts have only been demonstrated at 20,000’ MSL and below
Airspeed KIAS < 15,000’
Airspeed KIAS at 15,001 – 20,000’
Useful power available 40 seconds from starter engagement
Lose 1,200’ of altitude during an airstart
Finishing Critical Action Items (if start unsuccessful)
PCL – Off
Firewall Shutoff Handle – Pull
Execute Forced Landing or Eject
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

22. Take Corrective Action (Immediate Airstart)
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
NATOPS
Airstarts have only been demonstrated at 20,000’ MSL and below
Airspeed KIAS < 15,000’
Airspeed KIAS at 15,001 – 20,000’
Useful power available 40 seconds from starter engagement
Lose 1,200’ of altitude during an airstart
Finishing Critical Action Items (if start unsuccessful)
PCL – Off
Firewall Shutoff Handle – Pull
Execute Forced Landing or Eject
Finishing Critical Action Items (if start successful)
PCL – As required after N1 reaches Idle RPM (approx. 67% N1)
PEL - Execute
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

23. Engine Failure Summary
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Unknown Engine Problem
Look at N1/ITT
N1/ITT Dropping below 60%/500° = Engine Failure!
Accomplish Engine Failure Critical Action Items
When get to Airstart step
Decide if warranted
4-Fs/Time/Altitude
Accomplish Immediate Airstart Critical Action Items
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

24. Analyze the Situation Go back to beginning N1 ITT #2 #1 Engine Problem
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to beginning
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

25. Analyze the Situation Go back to beginning
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to beginning
Look at N1/ITT and indications are good
Core of engine is running fine
Problem is with power take-off from the engine (thrust)
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

26. Analyze the Situation Go back to beginning
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to beginning
Look at N1/ITT and indications are good
Core of engine is running fine
Problem is with power take-off from the engine (thrust)
Look at Q/Np
Tells how engine power is being used for thrust
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

27. Analyze the Situation Go back to beginning
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to beginning
Look at N1/ITT and indications are good
Core of engine is running fine
Problem is with power take-off from the engine (thrust)
Look at Q/Np
Tells how engine power is being used for thrust
2 Possible Scenarios
Np ↓/Q ↑
Np OK/Q ↓
Both use the same Critical Action Items but for different reasons
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

28. Analyze the Situation (Np OK/Q ↓)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
If Np is OK & Q drops, what has happened?
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
Show Video N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

29. Analyze the Situation (Np OK/Q ↓)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
If Np is OK & Q drops, what has happened?
Uncommanded Power Change/Loss of Power!
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
Show Video N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

30. Analyze the Situation (Np OK/Q ↓)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
If Np is OK & Q drops, what has happened?
Uncommanded Power Change/Loss of Power!
2 Possible causes:
PMU has rolled back engine (digital signal to FMU)
FMU has a problem scheduling
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
Show Video N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

31. Take Corrective Action (Uncommanded Power Change/Loss of Power)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncomm Pwr Change/Loss of Pwr Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

32. Take Corrective Action (Uncommanded Power Change/Loss of Power)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncomm Pwr Change/Loss of Pwr Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes digital signal from PMU to FMU
Could be faulty signals to the PMU
Could be faulty signals from the PMU
PCL now controlling FMU via flexible cable
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

33. Take Corrective Action (Uncommanded Power Change/Loss of Power)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncomm Pwr Change/Loss of Pwr Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes digital signal from PMU to FMU
Could be faulty signals to the PMU
Could be faulty signals from the PMU
PCL now controlling FMU via flexible cable
Prop Sys CB….no reason to go here as Np was fine (not a feather issue)
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

34. Take Corrective Action (Uncommanded Power Change/Loss of Power)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncomm Pwr Change/Loss of Pwr Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes digital signal from PMU to FMU
Could be faulty signals to the PMU
Could be faulty signals from the PMU
PCL now controlling FMU via flexible cable
Prop Sys CB….no reason to go here as Np was fine (not a feather issue)
PCL – As required
If power is restored (Q climbing back) then check range and move to step 5
If no power comes back/not responsive…move PCL to manipulate FMU?
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

35. Take Corrective Action (Uncommanded Power Change/Loss of Power)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncomm Pwr Change/Loss of Pwr Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes digital signal from PMU to FMU
Could be faulty signals to the PMU
Could be faulty signals from the PMU
PCL now controlling FMU via flexible cable
Prop Sys CB….no reason to go here as Np was fine (not a feather issue)
PCL – As required
If power is restored (Q climbing back) then check range and move to step 5
If no power comes back/not responsive…move PCL to manipulate FMU?
PEL – Execute
If some power came back, need to cycle PCL to see how much & what descent rate
Compare to 1,350-1,500 FPM to decide if need to shut down (if power is insufficient)
If decide to shut down engine…continue with steps 6-9
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

36. Uncommanded Power Change/Loss of Power Summary
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Unknown Engine Problem
Look at N1/ITT – N1/ITT are OK
Look at Q/Np – Q is dropping/Np is OK
Identified Uncommanded Power Change/Loss of Power
Execute Critical Action Items
UnComm Power Chg/ Loss of Pwr
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

37. Analyze the Situation (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to the point of checking Q/Np
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
PIU modulates oil flow & pressure to prop pitch control mechanism via transfer sleeve N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

38. Analyze the Situation (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to the point of checking Q/Np
If Np drops & Q rises, what has happened?
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
PIU modulates oil flow & pressure to prop pitch control mechanism via transfer sleeve N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

39. Analyze the Situation (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Go back to the point of checking Q/Np
If Np drops & Q rises, what has happened?
Uncommanded Propeller Feather!
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
Watch video N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

40. Analyze the Situation (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Possible causes:
PMU malfunction
PIU malfunction
Prop-sleeve touchdown cuts off oil to prop
Some mechanical issue with pitch control mechanism
Feather Dump Solenoid Valve (controlled by PCL) has opened
Prop Servo Valve (controlled by PMU) has opened
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
PIU modulates oil flow & pressure to prop pitch control mechanism via transfer sleeve N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

41. Analyze the Situation (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Possible causes:
PMU malfunction
PIU malfunction
Prop-sleeve touchdown cuts off oil to prop
Some mechanical issue with pitch control mechanism
Feather Dump Solenoid Valve (controlled by PCL) has opened
Prop Servo Valve (controlled by PMU) has opened
The critical action items attempts to remedy most of these!
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject
PIU modulates oil flow & pressure to prop pitch control mechanism via transfer sleeve N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

42. Take Corrective Action (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncommanded Prop Feather Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

43. Take Corrective Action (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncommanded Prop Feather Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes PMU control to PIU (more oil)
Possible faulty signal from PMU to open Prop Servo Valve
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

44. Take Corrective Action (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncommanded Prop Feather Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes PMU control to PIU (more oil)
Possible faulty signal from PMU to open Prop Servo Valve
Prop Sys CB – Pull if NP stable below 40%
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

45. Take Corrective Action (Np ↓/Q ↑)
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Execute Uncommanded Prop Feather Critical Action Items
PCL – Midrange
Positioning for a step-change during next step
PMU Switch – Off
Removes PMU control to PIU (more oil)
Possible faulty signal from PMU to open Prop Servo Valve
Prop Sys CB – Pull if NP stable below 40%
PCL – As required
If prop unfeathers (Q decreasing/Np increasing), check PCL range and descent rate
If enough power, execute step 5
If not enough power, jump to step 6
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

46. Uncommanded Prop Feather Summary
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Unknown Engine Problem
Look at N1/ITT – N1/ITT are OK
Look at Q/Np – Np is dropping/Q is rising
Identified Uncommanded Prop Feather
Execute Critical Action Items
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd

47. UnComm Power Chg/ Loss of Pwr
Conclusion
1. PCL – Mid Range
2. PMU Switch – Off
3. Prop Sys CB – Pull if Np stable below 40%
4. PCL – As req
5. PEL – Execute
6. Prop Sys CB – Reset, as req
7. PCL – Off
8. Firewall Shutoff Handle – Pull
9. Execute Forced Landing or Eject
1. PCL – Off
2. Starter Switch – Auto/Reset
3. PCL – Idle, Above 13% N1
4. Eng Inst – Monitor ITT, N1 & Oil P
5. PCL – Off
6. Firewall Shutoff Handle – Pull
7. Execute Forced Landing or Eject
8. PCL – As req after N1 Idle RPM (67%)
9. PEL – Execute
Identified three main in-flight engine malfunctions and how to recognize each one
Elicited a method for quick identification of malfunction
Expanded on each Critical Action Item step for clear comprehension of actions
UnComm Prop Feather
UnComm Power Chg/ Loss of Pwr
Np ↓
Q ↑
Np (>40%)
Q ↓
Immediate Airstart
4-Fs (Fire/FOD/Frozen/Fail) Other: Alt or Time Q Np
Engine Failure
1. Zoom Glide – 125 KIAS
2. PCL – OFF
3. Intercept ELP
4. Airstart – Attempt if Warranted
5. Firewall Shutoff Handle – Pull
6. Execute Forced Landing or Eject N1
ITT
N1 ↓ (< 60%)
ITT ↓ (< 500°)
(Below Idle) N1
ITT #2 Np Q
Oil P
ITT
Oil T #1
Engine Problem N1
Hyd