Helicopter Autorotation Procedure

Questions and Answers

What is the primary indication of an input drive clutch malfunction on an affected engine?

Sudden drop in NP of the affected engine

Loss of torque indication on the opposite engine

Erratic torque indication on the affected engine (correct)

Complete loss of hydraulic pressure

What should be done first in response to an input drive clutch malfunction?

Turn off the power levers

Jettison the wing stores as appropriate

Reduce the collective to minimize rate of descent

Press the EMERG HYD button (correct)

What is the recommended procedure when experiencing a sudden disengagement of the input drive clutch?

Try to re-engage the clutch

Turn off the power levers immediately (correct)

Autorotate to reduce the rate of descent

Reduce the collective to minimize turn rate

What is a possible consequence of a sudden engagement of the input drive clutch?

Severe engine and/or drive train damage Signup and view all the answers

During autorotation, what should be done at approximately 5 to 10 ft above touchdown?

Turn off the power levers Signup and view all the answers

What is a possible symptom of a tail rotor fixed pitch malfunction?

Slow or intermittent response to pedal input Signup and view all the answers

What should be done after an input drive clutch malfunction to minimize the rate of descent?

Reduce the collective to a lower setting Signup and view all the answers

What is the first step in responding to a flight control malfunction?

LAND AS SOON AS POSSIBLE Signup and view all the answers

In what situation is wing stores jettison typically used?

In an emergency situation, as appropriate Signup and view all the answers

What is indicated by a sudden increase in main rotor vibration and/or unusual noise?

Imminent failure of the main rotor components Signup and view all the answers

What should be done when the AUTOROTATE procedure is initiated?

Apply full collective Signup and view all the answers

What is a possible consequence of a failure within the flight control system?

Binding or resistance in the controls Signup and view all the answers

When should the occupants of the helicopter egress?

After the main rotor has stopped Signup and view all the answers

What is the purpose of the AUTOROTATE procedure?

To apply full collective to decay rotor RPM Signup and view all the answers

What is indicated by the activation of the BUCS FAIL caution?

Mistrack between the crew station controls Signup and view all the answers

What should be done after the main rotor has stopped?

Exit the helicopter Signup and view all the answers

What is the immediate consequence of a Main Transmission Tail Rotor Idler Gear or Output Shaft Bevel Gear Set failure?

Loss of tail rotor thrust and hydraulics Signup and view all the answers

What should the crew do to maintain airspeed during a shallow approach to landing?

Reduce power and lower the nose Signup and view all the answers

What is the purpose of reducing power and lowering the nose during a shallow approach to landing?

To maintain adequate airspeed and prevent slowing Signup and view all the answers

What should the crew avoid during an emergency procedure?

Slowing the helicopter Signup and view all the answers

What happens to the AARD when the flight controls are moved prior to activation of the Emergency Hydraulics?

It becomes inoperative and decouples Signup and view all the answers

What can be used to maintain flight during a sideslip?

True airspeed, yaw angle, engine torque, and rate of climb or descent Signup and view all the answers

What is the ideal airspeed to maintain during a shallow approach to a roll on landing?

100 KTAS Signup and view all the answers

When should the crew begin a gradual deceleration during a shallow approach to landing?

At 10 to 20 ft above the touch-down point Signup and view all the answers

During a loss of tail rotor thrust at slow speed, what is the primary objective in the immediate aftermath of the failure?

Reduce the yaw rate and begin a controlled descent. Signup and view all the answers

In a scenario where the helicopter cannot be accelerated into forward flight after a loss of tail rotor thrust, what action should be taken?

Initiate a power-on descent, adjusting collective for a manageable descent rate. Signup and view all the answers

Jettisoning wing stores after a loss of tail rotor thrust is primarily intended to do what?

Reduce the helicopter's gross weight, drag, and improve airflow over the vertical fin. Signup and view all the answers

Which of the following is NOT a recommended action in response to a loss of tail rotor thrust in cruise flight?

Maintain a stable yaw angle and continue flight as much as possible. Signup and view all the answers

What is the primary objective when attempting to recover from a loss of tail rotor thrust at slow speed?

Reduce yaw rate and begin a controlled descent. Signup and view all the answers

If a loss of tail rotor thrust occurs at a low altitude, which of the following actions is NOT recommended?

Land as quickly as possible, even if it means an uncontrolled descent. Signup and view all the answers

What is the primary purpose of reducing collective pitch in response to a loss of tail rotor thrust?

Reduce the rate of descent and yaw rate. Signup and view all the answers

If the helicopter cannot be accelerated into forward flight after a loss of tail rotor thrust, what is the primary concern regarding the collective pitch?

It should be adjusted to achieve a balance between descent rate and yaw rate. Signup and view all the answers

What is the first action to take during an abort start procedure?

POWER lever — OFF Signup and view all the answers

If an aborted engine start shows an abnormal TGT rise, what immediate action should be taken?

Check the ignition system Signup and view all the answers

What should be done if fuel is evident in the nacelle after an aborted start?

Open the nacelle door and inspect before resuming starts Signup and view all the answers

During a dual engine failure recognition, what will the MPD display?

ENGINE 1 OUT or ENGINE 2 OUT Signup and view all the answers

After a dual engine failure at low altitude, what is the appropriate action regarding airspeed?

Adjust airspeed as appropriate Signup and view all the answers

What is a recommended action during a preemptive landing following dual engine failure?

Perform wing stores jettison as appropriate Signup and view all the answers

What does the term 'autorotation' refer to in the context of helicopter flight?

An engine power-off descent Signup and view all the answers

How can an engine chop condition be detected?

Noticing sudden loss of power or responsiveness Signup and view all the answers

What should be done first in response to a flight control malfunction?

LAND AS SOON AS POSSIBLE Signup and view all the answers

What may indicate imminent failure of the main rotor components?

Sudden increase in main rotor vibration and/or unusual noise Signup and view all the answers

What should be done after the main rotor has stopped?

Exit the helicopter immediately Signup and view all the answers

What does the activation of the BUCS FAIL caution indicate?

Imminent failure of the main rotor components Signup and view all the answers

What should be done during autorotation?

Apply full collective to decay rotor RPM Signup and view all the answers

Why is it important to land as soon as possible in case of a flight control malfunction?

To reduce the risk of collapse or separation of the main rotor system Signup and view all the answers

What should be done immediately after a flight control malfunction?

LAND AS SOON AS POSSIBLE Signup and view all the answers

What is the purpose of the autorotation procedure?

To land the helicopter safely Signup and view all the answers

What should be done in case of a dual TRU failure?

Conduct Emergency Procedures for the displayed EUFD Cautions in order of importance Signup and view all the answers

What should be done to eliminate smoke and fumes in the crew station?

Open the canopy door to the intermediate position Signup and view all the answers

What happens to the stabilator control in case of a dual TRU failure?

It becomes inoperative Signup and view all the answers

What should be done in case of an electrical system malfunction?

Isolate the defective circuit by selectively turning off electrical equipment Signup and view all the answers

What happens to the MPDs in case of a dual TRU failure?

They become inoperative Signup and view all the answers

What should be done in case of an immediate landing cannot be made after an electrical system malfunction?

Isolate the defective circuit by selectively turning off electrical equipment Signup and view all the answers

What happens to the primary crew station lighting in case of a dual TRU failure?

It is lost Signup and view all the answers

What is the recommended airspeed to maintain during a shallow approach to landing after an electrical system malfunction?

20 KTAS maximum Signup and view all the answers

Which action should be taken immediately after an engine fire in flight?

Press the EMERG ENG(S) SHUTDOWN button Signup and view all the answers

When should the pilot select the RES (Reserve) fire extinguisher bottle?

If the PRI (Primary) bottle fails to extinguish the fire Signup and view all the answers

What is the primary purpose of turning off the ECS (Environmental Control System) in case of an engine fire?

To stop the crew station blowers from drawing smoke into the cockpit Signup and view all the answers

What is the recommended procedure for shutting down an engine on the ground when the input drive clutch fails to engage?

Immediately engage the EMERG ENG(S) SHUTDOWN Signup and view all the answers

What is the recommended procedure for an engine shutdown on the ground when the input drive clutch fails to disengage?

Engage the EMERG ENG(S) SHUTDOWN Signup and view all the answers

If an engine fire occurs in flight, what action should be taken prior to moving the POWER lever?

Press the ENG 1 or ENG 2 FIRE pushbutton Signup and view all the answers

In the event of a fire in the crew station, what is the first action to be taken?

Turn off the ECS Signup and view all the answers

If an APU is running during an engine fire, what action should be taken before evacuating the aircraft?

Initiate an APU shutdown Signup and view all the answers

What happens to the unaffected engine when the affected engine shuts down due to NP overspeed?

It increases NG speed and TQ to assume the load demand. Signup and view all the answers

Which statement is true about the activation of low rotor RPM warning?

It occurs due to engine performance limiting after an NP overspeed. Signup and view all the answers

What action should the crew take if the affected engine does not relight after shutdown?

Retard the power lever of the unaffected engine. Signup and view all the answers

What distinguishes self-ignition from auto re-ignition in the T700-GE-701D engine?

Self-ignition occurs without prior command. Signup and view all the answers

In the event of an NP overspeed event, how long can it take for the unaffected engine to stabilize at the required speed?

Up to 4 seconds Signup and view all the answers

What occurs on the EUFD during an overspeed event followed by a shutdown?

It will indicate low rotor RPM. Signup and view all the answers

What is the crew's responsibility when the power lever is in LOCKOUT mode?

To manually control to ensure the engine stays within operating limits. Signup and view all the answers

What is indicated when there is an increase in NR and NG after an affected engine shuts down?

The condition may suggest self-ignition or auto re-ignition. Signup and view all the answers

In the event of a malfunctioning engine, what is the primary action to be taken to avoid shutting down the wrong engine?

Identify the malfunctioning engine by checking engine-out warning. Signup and view all the answers

What should be done if the canopy jettison does not occur on the first attempt?

Check the handle position, ensure it's at 90°, and push again. Signup and view all the answers

What is the recommended procedure if TGT rises above 540° C after engine shutdown?

Place the ENG START switch in IGN ORIDE position and motor the engine. Signup and view all the answers

What is the primary objective of the crew in an emergency engine shutdown?

Shut down the engine without delay. Signup and view all the answers

Why is it crucial to avoid activating the canopy removal system when combustible fuel/vapors are present?

It can lead to an explosion/fire. Signup and view all the answers

In a situation where the canopy jettison does not occur, what alternative means of egress can be utilized?

Fracturing the canopy side panel with the crewmembers survival knife. Signup and view all the answers

What does the term "EMERG ENG SHUTDOWN" signify?

Engine shutdown without delay, usually triggered by a fire. Signup and view all the answers

What is the primary concern when the helicopter cannot be accelerated into forward flight after a loss of tail rotor thrust?

The helicopter will be unable to maintain altitude. Signup and view all the answers

Study Notes

###Autorotation

Perform a hovering autorotation at approximately 5 to 10 ft above touchdown by pressing the CHOP button or setting POWER levers to OFF
Reduce collective to compromise between rate of turn and rate of descent
Minimize rate of descent (10 to 20 ft above touchdown)
Set POWER levers to OFF (5 to 10 feet above touchdown)

###Main Transmission Input Drive Clutch Failure

Failure may occur during engine start or when an engine POWER lever is advanced
Indications include:
Erratic torque indication on affected engine
Complete loss of torque indication on affected engine
NP of affected engine exceeding NR
Response:
EMERG HYD button — Press ON
Collective — Reduce
Wing Stores Jettison — As appropriate
Minimize Rate of Descent
POWER levers — OFF (5 to 10 feet above touchdown)

###Tail Rotor Fixed Pitch Malfunction

Failure may be evidenced by slow, intermittent, or no response to pedal input or no pedal movement
Left or right yaw may be apparent
Response:
AUTOROTATE — Apply full collective to decay rotor RPM as helicopter settles
Exit when main rotor has stopped

###Flight Control Malfunctions

Failure of components may be indicated through varying degrees of feedback, binding, resistance, sloppiness, or abnormal control responses
Response:
1. LAND AS SOON AS POSSIBLE
2. APU — ON
3. EMERG ENG(S) SHUTDOWN

###Main Rotor Components Failure

Imminent failure may be indicated by a sudden increase in main rotor vibration and/or unusual noise
Response:
- A minimum of 100 KTAS during a shallow approach to a roll on landing should be maintained until approximately 10 to 20 ft above the touchdown point
- Begin a gradual deceleration to arrive at approximately 5 to 10 ft above touchdown

###Single Engine Failure – Low Altitude/Low Airspeed and Cruise

Voice message will announce ENGINE 1 OUT or ENGINE 2 OUT
Response:
1. Airspeed — Adjust as appropriate
2. Wing Stores Jettison — As appropriate
3. LAND AS SOON AS PRACTICABLE

###Loss of Tail Rotor Thrust

May result in extreme yaw angles and uncontrolled rotation to the right
Response:
- Immediate collective pitch reduction to reduce yaw rate
- Jettison wing stores to reduce gross weight, drag, and improve airflow over the vertical fin
- If possible, increase airspeed to streamline the helicopter and aid forward acceleration

Emergency Exit and Entrance

Identification of malfunctioning engine is crucial to avoid shutting down the wrong engine in flight.
Activation of canopy removal system when combustible fuel/vapors are present can result in an explosion/fire.
If TGT rises above 540° C or shows evidence of combustion, place ENG START switch in IGN ORIDE position and motor engine until TGT decreases below 540° C.
Emergency engine shutdown (EMERG ENG SHUTDOWN) is defined as engine shutdown without delay.

Emergency Engine Shutdown

EMERG ENG SHUTDOWN (affected engine only): check NG is less than 10%.
EMERG ENG(S) SHUTDOWN (both engines simultaneously): if APU is running, accomplish APU shutdown prior to evacuating the aircraft.

Fires

If an engine fire occurs in flight, a voice message will announce ENGINE 1 (or) ENGINE 2 FIRE.
Engine must be controlled manually to ensure it does not exceed operating limits.

Engine Malfunctions

It's possible for the T700-GE-701D engine to self-ignite or auto re-ignite following an NP overspeed and shutdown event if TGT is high enough.
Self-ignition differs from auto re-ignition in that it is uncommanded and not a normal function of the AH-64E.

Flight Control Malfunctions

Failure of components within the flight control system may be indicated through varying degrees of feedback, binding, resistance, sloppiness, or abnormal control responses.
BUCS FAIL caution may indicate a failure within the system or a mistrack between the crew station controls.
Imminent failure of the main rotor components may be indicated by a sudden increase in main rotor vibration and/or unusual noise.

Electrical System Malfunctions

Dual TRU failure (Transformer Rectifier 1 and Transformer Rectifier 2) will result in a number of Cautions and Advisories displayed on the EUFD, including BUCS FAIL and FMC FAIL.
DC services will be lost, except those provided by the battery, and charging of the battery will no longer be conducted.

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Description

This quiz covers the steps to perform a safe autorotation during a helicopter touchdown, including maintaining a compromise between rate of turn and rate of descent.