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Question 1

Electrical Power Supply System Malfunction

Alternating Current System Failure

Answer 1

1. Affected generator — RESET/OFF, then ON.
2. If one or two generators fail — Land as soon as practical.
3. If all generators fail or if two generators fail during night, instruments, or icing conditions—Land as soon as possible.
4. Failure of any generator with a simultaneous supervisory panel failure will result in loss of the associated primary AC bus. If this occurs during night or IMC — Land as soon as possible.

NOTE
When operating the aircraft with the No. 1 generator on, and the No. 2 and No. 3 generators off or failed, the No. 3 primary AC bus will be lost failing the No. 2 AFCS computer, AHRS, TACAN, VOR, all three BDHIs, and the radar altimeter. Additionally, for NO. 2 GEN, NO. 3 GEN, NO. 2 RECT, BIM®, C/G HOOK INOP caution lights and the AFCS control panel will display a simplex failure.

Question 2

Electrical Power Supply System Malfunction

Direct Current System Failure

Answer 2

1. If either rectifier fails — Land as soon as practical.
2. Extend landing gear.
3. If both rectifiers should fail, or if either rectifier fails at night or during instrument conditions, land as soon as possible.

Question 3

Emergency Descent

Answer 3

There is no set procedure for an emergency descent. Damage to the helicopter or engines must be considered secondary to getting the helicopter on the ground. During an extreme emergency, the condition or type of landing may be the determining factor in the type of emergency descent to be made. If a long distance must be covered to a selected landing site, a dive with power would be most feasible. A normal power-on vertical landing may be made when the landing site is reached. A circling autorotation, at higher airspeeds, will provide a higher rate of descent and view of the landing site.

Question 4

Emergency Landing

Answer 4

• 1. Cabin occupants — NOTIFIED/SEATBELTS FASTENED.
• 2. Lower personnel door, ramp/ramp door and external cargo hatches — CLOSED.
• 3. Crew — Seat belts fastened/inertia reel locked (AFC−562).

WARNING
Failure to remove aircrewman safety belt (gunners belt), when simultaneously restrained by troop seat or crewchief seat safety harness (seat belt), may result in serious injury or death in the event of a hard or crash landing.

*4. Notify pilot that cargo/passengers/crew prepared for emergency landing.

Question 5

Emergency Shutdown

Answer 5

If an emergency situation such as fire, control failure, transmission failure, etc. dictates immediate discontinuation of engine or rotor system operation, stop the aircraft if moving, request assistance as necessary, and proceed as follows:

• 1. High pressure rotor brake switch — EMERGENCY.
• 2. All engine speed control levers — SHUT OFF.
• 3. APP — As required.
• 4. Fuel selector levers — SHUT OFF.

WARNING
• A fire hazard exists during emergency brake application due to the heat generated and the presence of debris and oil in the rotor brake area.
• Personnel should not exit the cabin section during emergency shutdown until the rotor head has stopped.

NOTE
Underfrequency protection may cause loss of electrical power due to rapid Nr decay prior to complete pressurization of the emergency rotor brake.

Question 6

Engine Chip Locator Light

Answer 6

An engine chip locator light accompanied by unusual vibrations and/or low oil pressure high oil temperature, or an engine chip locator light returning after resetting circuit breaker without the above indications, is cause to suspect probable engine failure. If an engine chip detector light goes on, do this:

*1. Instruments/caution lights — Check.

If secondary indications are present (vibrations/low oil pressure/high oil temperature).
*2. Perform Single- or Dual-Engine Failure procedures.

If the chip light is not accompanied by secondary indications:
*3. Pull and reset engine chip circuit breaker.

If chip locator light returns after circuit breaker is reset:
4. Perform Single- or Dual-Engine Failure procedures.

If chip locator light remains off:
5. Continue mission, monitoring engine performance closely.

WARNING
Level single- or dual-engine flight and/or safe single- or dual-engine hover landings may not be possible at certain combinations of helicopter gross weight and density altitude. Flight conditions may require that the decision to establish single- or dual-engine flight be deferred until a safe descent is possible. Select landing site suitable for running landing if available.

Question 7

Engine Compartment Fire(s) on the Ground

Answer 7

If an engine compartment fire occurs while on the ground, do this:

• 1. Speed control levers — As required (affected engine(s) shut off).
• 2. Engine emergency T-handle(s) — Pull aft (affected engine(s)).
• 3. Main engine fire extinguisher switch — Main, reserve if necessary.
     
     4. Groundcrew — Alerted

Question 8

Engine Post shutdown

Answer 8

An engine postshutdown fire in the combustion chamber after shutdownmay continue to feed itself unless it is blown
out by compressor air. Indications would be a rise in T5 above 320 °C after shutdown and/or excessive smoke from the engine exhaust outlet.

• 1. Speed control lever — SHUTOFF.
• 2. Fuel selector lever — SHUTOFF.
• 3. Emergency start switch — EMER.
• 4. Starter button — Press. Motorize engine until fire is put out, and observe T5.

NOTE
If all engines have been shut down, APP should be operating.

5. If fire continues, be sure EAPS doors are open and have fire extinguisher discharged into air inlet duct while motoring engine.
6. Pull down on handle of speed control lever to stop starter.

If an engine fire warning light goes on:

7. Emergency T-handle — Pull aft to select engine compartment for fire extinguisher.
8. Engine fire extinguisher switch — Main. Reserve, if necessary.

Question 9

Electrical Fire

Answer 9

In case of an electrical fire, attempt to isolate the affected circuits by selectively securing electrical equipment or pulling circuit breakers. If fire persists, land immediately; while in flight, do as follows:

WARNING
Turning all generators off will result in immediate loss of all electrical instruments, warning systems, ICS, and AFCS, except servo 1. Helicopter response to total electrical loss may be violent. Landing gear may only be extended by the emergency method, and a positive gear down check will not be possible. Consideration should be given to all problems before turning all generators off.

• 1. Circuit breaker (for affected circuit) — Pull.
• 2. Fight fire with portable fire extinguisher.
• 3. If fire persists — Land immediately.