EP Flashcards
ENGINE MALFUNCTION IN FLIGHT
*1. Control Nr.
Warning
Flying with greater than 110% torque with one engine inoperative may result in unrecoverable decay og Nr in the event of a dual engine failure.
- CONTGCY PWR switch - ON.
- Single engine conditions - Establish.
- ENG ANTI-ICE switches - as required.
Warning
With engine anti-ice on, up to 18% torque available is lost. Torque may be reduced as much as 49% with improperly operating engine inlet anti-ice valves.
- External cargo/stores/fuel - Jettison/dump, as required.
- Identify malfunction.
ABORT START
To abort start:
*1. PCL - OFF.
*2. ENGINE IGNITION switch - OFF.
If engine oil pressure is indicated.
*3. Starter - Engage.
4. Starter - disengage after 30 seconds and TGT below 540 C.
ENGINE MALFUNCTION DURING HOVER/TAKEOFF
*1. Control Nr.
*2. CONTGCY PWR switch - ON.
If a suitable landing site exists or unable to transition to forward flight:
*3. Set level attitude, eliminate drift, cushion landing.
If able to transition to forward flight
*4. Engine Malfunction in Flight emergency procedure - Perform.
(#1/#2) FUEL FLTR BYPASS OR (#1/#2) FUEL PRESS CAUTION
*1. Fuel selector lever (affected engine) - XFD (DIR if currently in XFD).
2. Land as soon as practicable.
If affected engine indications are abnormale:
3. Engine Malfunction in Flight Procedure - Perform.
1 and #2 FUEL FLTR BYPASS OR #1 AND #2 FUEL PRESS CAUTION
*1. Land as soon as possible.
*APU Emergency Start procedure - Perform.
Warning
Be prepared for dual-engine failure. Recommended airspeed is 80 KIAS to minimize Nr droop should dual-engine failure occur.
Note
Consideration should be given to performing applicable steps of the Immediate Landing/Ditching emergency procedure.
COMPRESSOR STALL
*1. Engine Malfunction in Flight emergency procedure - Perform.
2* PCL (malfunctioning engine) - IDLE.
If TGT decreases an stall clears:
3. PCL - slowly advance to FLY.
If stall remains cleared:
4. Land as soon as practicable. Avoid rapid collective movement.
If TGT continues to rise, Ng decreases below normal idle speed, or any other malfunction is indicated:
5. Engine Shutdown in Flight emergency procedure - perform.
ENGINE HIGH-SPEED SHAFT FAILURE
(#1/#2) DRIVESHAFT FAIL
CAUTION
Following a high-speed shaft failure, the engine will overspeed, the Np overspeed system will flame out the engine, and the auto-ignition system will activate the relight feature. The engine Np governor will eventually bring Np down toward 100%. The engine must be manually shut down to prevent further damage.
*1. Engine Malfunction in Flight Emergency procedure - Perform.
*2 PCL (malfunctioning engine) OFF.
3. Land as soon as practicable.
Consideration should be given to performing the following:
4. Engine Shutdown in Flight emergency procedure.
5. Single-Engine Landing emergency procedure.
ENGINE HIGH-SIDE FAILURE IN FLIGHT
(#1/#2) ENG SPEED HI
*1. Engine Malfunction in Flight Emergency procedure - Perform.
NOTE
Ng does not pass through the e
EDECU and is a highly reliable signal.
Torque signal may be erratic or drop off for high side conditions driven be EDECU failure.
- PCL (malfunctioning engine) - Retard to set:
a. Torque 10% below good engine, or
b. Matched Ng, or
c. Matched TGT.
- PCL (malfunctioning engine) - Retard to set:
- Land as soon as practicable.
ENGINE HIGH-SIDE FAILURE ON DECK
(#1/#2) ENG SPEED HI
*1. PCLs - IDLE.
ENGINE LOW-SIDE FAILURE
(#1/#2) ENG SPEED LOW
OR
ENG SPEED LOW
*1. Engine Malfunction in Flight Emergency procedure - Perform.
- PCL (malfunctioning engine) - momentarily advance to LOCKOUT, then retard to set:
a. Torque 10% below good engine, or
b. Matched Ng, or
c. Matched TGT. - Land as soon as practicable.
ENGINE TORQUE OR TGT SPIKING/FLUCTUATIONS
TORQUE SPLIT
If an engine instrument is spiking/fluctuating and inducing secondary indications in Ng, Np and/or Nr:
*1. Engine Malfunction in Flight Emergency procedure - Perform.
If fuel contamination is suspected:
*2. Land as soon as possible.
WARNING
PCL movement during engine fluctuations may precipitate an engine failure. Consider performing APU Emergency Start procedure prior to manipulating the PCL. Maintaining a low power setting when moving the PCL will minimize the Nr decay rate if the malfunctioning engine fails.
If engine electronic circuitry is suspected:
- PCL (malfunctioning engine) - Momentarily advance to LOCKOUT, then retard to set:
a. Torque 10% below good engine, or
b. Matched Ng, or
c. Matched TGT.
If fluctuations persist:
4. PCL (engine in LOCKOUT) - Retard to idle, then retur to FLY.
- Repeat Steps 3 and 4. for other engine, as required.
If an engine instrument is spiking/fluctuationg with no secondary indications:
- Land as soon as practicable.
DUAL-ENGINE FAILURE
- Autorotation - Establish.
- Immediate Landing/Ditching emergency procedure - perform.
If time and altitude permits:
*3. Engine Air Restart emergency procedure - Perform.
SINGLE-ENGINE FAILURE IN FLIGHT
(#1/#2) ENG OUT
AND
TORQUE SPLIT
*1. Engine Malfunction in Flighetform. emergency procedure - 2. Land as soon as practicable. Consideration should be given to performing the following: 3. Engine Shutdown in Flight emergency procedure. 4. Engine Air Restart procedure. emergency 5. Single-Engine Landing emergency procedure.
ENGINE AIR RESTART
*1. APU Emergency Start procedure - As required.
*2. ENGINE IGNITION switch - NORM.
*3. Fuel selector lever - DIR or XFD
*4. PCL - OFF.
*5. Starter - Engage, motor engine.
“6. PCL - IDLE (TGT 80 °C or less, if time
permits).
*7. PCL) - Advance to FLY after starter
dropout.
WARNING
If APU is unavailable, and a crossbleed start is necessary, maximum torque available will be reduced during the start sequence. Depending on operating conditions, level SOURCE
APU EMERGENCY START
*1. ECS OFF. *2. AIR SOURCE ECS/START switch APU. *3. FUEL PUMP switch - APU BOOST. *4. APU CTRL switch - ON. *5. APU GENERATOR switch - ON.