EPs Flashcards
For every EP, the PAC shall:
Complete the CMIs that do not require releasing the flight controls.
For every EP, the PNAC shall:
- Assist in ensuring the continued safe flight of the aircraft.
- Perform the CMIs that do not involve the flight controls.
- Use the PCL to complete non-CMI items.
- Troubleshoot as required.
For every EP, the aircrewman shall:
- Provide the pilots with verbal calls as necessary to ensure the continued safe flight of the aircraft.
- Complete the applicable CMIs.
- Use the PCL to complete the remaining non CMIs.
- Back up the pilots with the PCL to the max extent possible.
- Assist the PNAC with troubleshooting.
The following should be performed for all emergencies:
- Maintain control of the aircraft
- Alert crew
- Determine the precise nature of the problem
- Complete the applicable EP or take action appropriate for the problem
- Determine landing criteria and land as required
Land immediately
Execute a landing without delay
Land as soon as possible
Execute a landing at the first site at which a safe landing can be made
Land as soon as practicable
Extended flight is not recommended. The landing site and duration of flight are at the discretion of the PIC
CB handling terms: CHECK
Visually observe CB condition. Do not change condition.
CB handling terms: PULL
If CB is in, pull CB out. If CB is out, do not change condition.
CB handling terms: RESET
If CB is out, push CB in. If CB is in, do not change condition. Popped CBs may be reset only one.
CB handling terms: CYCLE
If CB is in, pull CB out, and then push CB back in. If CB is out, do not change condition.
*CAUTION: Holding a CB while resetting may cause electrical fire or damage to electrical equipment.
“Single-engine condition”
A flight regime that permits sustained flight with One Engine Inoperative (OEI).
Engine Malfunction in Flight
*1. Control Nr.
WARNING: Flying with greater than 110% torque with one engine inoperative may result in unrecoverable decay of Nr in the event of a dual-engine failure.
*2. CONTGCY PWR switch - ON.
*3. Single-engine conditions - Establish.
*4. 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.
*5. External cargo/stores/fuel - Jettison/dump, as required.
*6. Identify malfunction.
Engine High-Side Failure in Flight
*1. EMIF - Perform.
NOTE: Ng does not pass through the EDECU and is a highly reliable signal. Torque signal may be erratic or drop off for high side conditions driven by EDECU failure.
*2. PCL (malfunctioning eng) - Retard to set:
A. torque 10% below good engine, or
B. matched Ng, or
C. matched TGT.
NOTE: With high collective settings, Nr may increase slowly, making high-side failure confirmation difficult.
Engine High-Side Failure on Deck
*1. PCL (malfunctioning engine) - IDLE.
Engine Low-Side Failure
(#1/#2) ENG SPEED LOW will display when ALL the following exist:
A. TRQ is 10% below good engine
B. Ng is 5% or less than good engine
C. Np is at or below 98%
D. Nr is at or below 97%
*1. EMIF - Perform.
Engine Torque or TGT Spiking/Fluctuations
If an engine instrument is spiking/fluctuating and inducing secondary indications in Ng, Np, and/or Nr:
*1. EMIF - perform
If fuel contamination is suspected:
*2. Land as soon as possible.
WARNING: PCL movement during engine fluctuations may precipitate an engine failure.
NOTE: Maintaining a low power setting when moving the PCL will minimize the Nr decay rate if the malfunctioning engine fails.
Compressor Stall
*1. EMIF - perform.
*2. PCL (malfunctioning engine) - IDLE.
NOTE: If the Ng decay relight feature attempts to relight the engine, subsequent compressor stalls may occur. A yaw kick may be experienced each time the engine relights.
Engine High-Speed Shaft Failure (Indications)
An impending high-speed shaft failure may manifest itself as a high-intensity, medium-to high-frequency vibration that may be felt throughout the aircraft. A howl may accompany the vibration.
If medium-to high- frequency vibrations/noises are identified and can be isolated to an impending high-speed shaft malfunction, consideration should be given to securing the engine, thereby precluding catastrophic failure of the high-speed shaft.
Engine High-Speed Shaft Failure
*1. EMIF - perform.
*2. PCL (malfunctioning engine) - OFF.
Load Demand System Malfunctions:
Types & Diagnosing
Types: roll-pin failure or LDS cable malfunction
Roll-pin fail will result in max LDS input to the HMU, regardless of collective position.
Diagnostics: Malfunctioning engine will LAG the good engine for several seconds.
Abort Start (causes)
- Ng does not reach 14% within 6 seconds after starter initiation.
- No oil pressure within 30 seconds after starter initiation (do not motor engine).
- No light-off within 30 seconds after moving PCL to IDLE.
- ENG STARTER advisory disappears before reaching 52% Ng.
- TGT is likely to exceed 851*C before idle speed is attained.
CAUTION: During aborted starts, failure to immediately stop fuel flow may result in engine overtemp.
Abort Start
*1. PCL - OFF.
*2. ENGINE IGNITION switch - OFF.
If engine oil pressure is indicated:
*3. Starter - Engage.
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. EMIF - Perform.
How much altitude required to accomplish an engine restart?
~ 5,000’ AGL (based on APU & eng start cycles & typical autorotation rates of descent)
Dual-Engine Failure
*1. Autorotation - Establish.
*2. Immediate Landing/Ditching EP - Perform.
If time & altitude permit:
*3. Engine Air Restart EP - Perform.
Autorotations (actual vs. practice yaw)
NOTE: With both engines secured, the cushioning collective pull at the bottom of the autorotation will result in left yaw vice the right year associated with practice (power-on) autorotations.
Single-Engine Failure in Flight
*1. EMIF - Perform.
Engine Air Restart
*1. APU Emergency Start procedure - as required.
NOTE: Failure to ensure AIR SOURCE ECS/START switch is in ENG prior to crossbreed start will result in a failed engine start.
*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 cross bleed start is necessary, maximum torque available will be reduced during the start sequence. Depending on operating conditions, level flight may not be possible.
CAUTION: Receiving engine Ng less than 24% prior to advancing PCL to IDLE may result in a hot start.