Emergency Procedures Flashcards
Power Failure (General)
Caused by engine or drive system failure.
Usually indicated by low RPM warning.
Engine: change in noise level, nose-left yaw, oil pressure light, decreasing engine RPM
Drive System: unusual noise or vibration, nose right or left yaw, decreasing rotor RPM with increasing engine RPM
Immediately lower collective to enter autorotation.
Aft cyclic is required when collective is lowered at high speed.
Do not apply aft cyclic during touchdown or ground slide.
Power Failure above 500’ AGL
- Lower collective immediately to maintain rotor RPM
- Establish glide at ~65 kias.
- Adjust collective to keep rotor RPM between 97-110%
- Select LZ, maneuver into wind
- Attempt restart (if appropriate)
- Turn off unnecessary switches & fuel valve
- Begin flare at 40’ AGL
- Level ship at 8’ AGL
- Cushion landing with collective
Power Failure bt. 8’ and 500’ AGL
- Lower collective immediately to maintain rotor RPM
- Adjust collective to keep rotor RPM between 97-110%
- Maintain airspeed
- Begin flare at 40’ AGL
- Level ship at 8’ AGL
- Cushion landing with collective
Land Immediately
Nearest clear area where a safe, normal landing can be performed.
Be prepared to enter autorotation.
Land as Soon as Practical
Pilot’s discretion based on problem and available LZ’s.
Flight beyond nearest airport not recommended.
Power Failure below 8’ AGL
- Right pedal
- Settle
- Cushion landing with collective
“No throttle, pedal, settle, pull”
Max Glide Configuration
- 75 KIAS
- 90% rotor RPM
- 4:1 or 1 nm / 1500’ AGL
Increase rotor RPM to 97% below 500’ AGL
Air Restart Procedure
Do not attempt it engine malfunction is suspected or before establishing autorotation.
- Mixture Full Rich (Down)
- Primer down and locked (if installed)
- Close throttle then crack slightly
- Actuate starter with left hand
Emergency Water Landing (Power Off)
- Same as for Power Failure over land until contacting water.
- Unlatch doors.
- Apply lateral cyclic to stop rotors.
- Exit.
Emergency Water Landing (Power On)
- Descend to hover.
- Unlatch doors.
- Passenger exits.
- Fly to safe distance.
- Battery & Alternator Off.
- Roll throttle into overtravel spring.
- Keep aircraft level and apply full collective.
- Lateral cyclic to stop rotors.
- Exit.
Loss of Tail Rotor Thrust (Forward Flight)
Nose-Right Yaw.
- Immediately enter autorotation.
- Maintain 70+ KIAS.
- Select LZ
- Roll throttle off into overtravel spring
- Perform autorotation landing
Vertical stabilizers may permit controlled flight above 70 KIAS at low power settings, but prior to reducing airspeed enter full autorotation.
Loss of Tail Rotor Thrust (in Hover)
Indicated by nose-right yaw.
- Roll throttle into overtravel spring.
- Settle.
- Cushion landing with collective.
“Throttle (no pedal), settle, pull”
Headset Audio Failure
Land as Soon as Practical
Engine Fire (During Start)
- Continue cranking and attempt start.
- If engine starts, run at 50-60% RPM for a short time.
- Fuel Mixture, Fuel Valve, Battery - OFF
- Rotor Brake & Exit
Engine Fire (in Flight)
- Enter Autorotation.
- Heat OFF, Vent OPEN
- If running, land then Fuel Mixture & Fuel Valve OFF. If stopped, Fuel Valve OFF, land.
- Battery OFF
- Rotor Brake & Exit
Electrical Fire (in Flight)
- Battery & Alternator OFF
- Vents OPEN
- Land Immediately.
- Fuel Mixture & Fuel Valve OFF
- Rotor brake & exit
Tach Failure
If either one fails use the other.
If both (or it is unclear which) fail, defer to the governor and land as soon as practical.
Governor Failure
Switch OFF and complete flight with manual throttle control.
Oil Light
Loss of oil pressure (and possibly engine power) - check gauge, if confirmed, land immediately.
MR Temp Light, MR Chip Light, TR Chip Light
If accompanied by any other indication of a problem (noise, vibration, temperature rise), land immediately.
Starter On Light
If light doesn’t go out when ignition is released, immediately pull mixture OFF and turn the battery OFF
Low RPM Light
Indicates rotor speed <97% RPM.
Lower collective, roll throttle on, and in forward flight apply aft cyclic.
Note: Light (and horn) are disabled when collective is full-down.
CO Light
Indicates CO in cabin.
Turn off heater and open vents. Land or transition to forward flight.
If CO poisoning symptoms accompany light, land immediately.
Right Roll in Low G
Gentle aft cyclic to restore positive G. Then correct roll if necessary.
Uncommanded pitch, roll, or yaw from turbulence.
Gradual application of controls to:
Maintain rotor RPM
Positive G
Eliminate side slip
Do not over-control.
Depart the area or land as soon as practical.
