Power Failures
Below 8 Feet AGL
1. Apply right pedal as required to prevent yawing
2. Allow rotorcraft to settle
3. Raise collective just before touchdown to cushion landing
Emergency Water Landing - Power OFF
1. Follow the same procedures as for poer failure over land until contacting water. If time permits, unlatch doors prior to water contact.
2. Apply lateral cyclic when aircraft contacts water to stop rotors
3. Release seat belt and quickly clear aircraft when rotors stop.
Electrical Fire in Flight
1. Battery and alternator switches OFF
2. Open cabin vents
3. Land immediately
4. Fuel mixture and fuel valve OFF
5. If time permits, apply rotor brake to stop rotors
6. Exit Helicopter
NOTE: Low RPM warning system and governor are inoperative with battery and alternator switches both OFF.
Loss Of Tail Rotor Thrust in Hover
Failure is usually indicated by nose right yaw which cannot be stopped by applying left pedal
1. Immediately roll throttle off into over travel spring and allow aircraft to settle
2. Raise collective just before touch down to cushion landing.
Headset Audio Failure
If headset audio fails, land as soon as practical
CAUTION: For aircraft which provide low RPM horn through the audio system, pilot will not hear horn with a failed headset.
Air Restart Procedure
CAUTION: Do not attempt restart if engine malfunction is suspected or before safe autorotation is established. Air restarts not recommended below 2000 feet AGL.
1. Mixture - OFF
2. Throttle - Closed
3. Starter - Engage
4. Mixture - Move slowly rich while cranking
Emergency Water Landing - Power ON
1. Descend to hover above water.
2. Unlatch doors
3. Passengers exit aircraft
4. Fly to safe distance from passengers to avoid possible injury by rotors
5. Switch battery and alternator OFF
6. Roll throttle off into over travel spring
7. Keep aircraft level and apply full collective as aircraft contacts water
8. Apply lateral cyclic to stop rotors
9. Release seat belt and quickly clear aircraft when rotors stop.
Engine Fire During Start on Ground
1. Cranking - Continue and attempt to start which would suck flames and excess fuel into engine
2. If engine starts, run at 60-70% for a short time
3. Fuel mixture OFF
4. Fuel valve OFF
5. Battery switch OFF
6. If time permits, apply rotor brake to stop rotors
7. Exit helicopter
Loss of Tail Rotor Thrust in Forward Flight
Failure is usually indicated by nose right yaw which cannot be corrected by applying left pedal
1. Immediately enter autorotation
2. Maintain at least 70 KIAS if practical
3. Select landing site, roll throttle off into over travel spring, and perform autorotation landing
NOTE: When a suitable landing site is not available, the vertical stabilizers may permit limited controlled flight at low power settings and airspeeds above 70 KIAS; however, prior to reducing airspeed, enter full autorotation.
Governor Failure
If engine RPM governor malfunctions, grip throttle firmly to override the governor, then switch governor off. Complete flight using manual throttle control.
Between 8 and 50 feet AGL
1. Lower collective immediately to maintain rotor RPM
2. Adjust collective to keep RPM between 97-108% or apply full down collective if light weight prevents attaining above 97%
3. Maintain airspeed until ground is approached, then begin cyclic flare to reduce the rate of descent and forward airspeed.
4. At about 8 feet, apply forward cyclic to level ship and raise collective just before touchdown to cushion landing. Touch down in level attitude and nose straight ahead.
Maximum Glide Distance Configuration
1. Airspeed approximately 90 KIAS
2. Rotor RPM approximately 90%
3. Best glide ratio is about 4.7:1 or one nautical mile per 1300 feet AGL.
Engine Fire In Flight
1. Enter autorotation
2. Cabin heat OFF
3. Cabin vent ON
4. If engine is running, perform normal landing, then fuel mixture OFF and fuel valve OFF. If engine stops running, fuel valve OFF and complete autorotation landing
5. Battery switch OFF
6. If time permits, apply rotor brake to stop rotors
7. Exit helicopter
Hydraulic system failure is indicated by heavy or stiff cyclic and collective controls. Loss of hydraulic fluid may cause intermittenet and/or vibrating feedback in the controls. Control will be normal except for the increase in stick forces
1. HYD Switch - verify ON
2. If hydraulics not restored, HYD switch - OFF
3. Adjust airspeed and flight condition as desired for comfortable control.
4. Land as soon as practical
Above 500 Feet AGL
1. Lower collective immediately to maintain rotor RPM
2. Establish a steady glide at approximately 70 KIAS
3. Adjust collective to keep RPM between 97-108% or apply full down collective if light weight prevents attaining above 97%
4. Select landing spot, if altitude permits, maneuver so landing will be into the wind
5. A restart may be attempted if sufficient time is available
6. If unable to restart, turn unnecessary switches and fuel valve off
7. At about 40 feet AGL begin cyclic flare to reduce the rate of descent and forward speed
8. At about 8 feet agl apply forward cyclic to level ship and raise collective just before touchdown to cushion landing. Touch down in level attitude with nose straight ahead.
Minimum Rate of Descent Configuration
1. Airspeed approximately 55 KIAS
2. Rotor RPM approximately 90%
3. Minimum rate of descent is about 1350 feet per minute. Glide ratio is about 4:1 or one nautical mile per 1500 feet AGL
CAUTION: Increase rotor RPM to 97% minimum when autorotating below 500 feet AGL.
Tachometer Failure
If rotor or engine tach malfunctions in flight, use remaining tach to monitor RPM. If it is not clear which tach is malfunctioning or if both tachs malfunction, allow governor to control RPM and land as soon as practical.
NOTE: Each tach, the governor, and the low RPM horn are on separate power circuits. A special circuit allows the battery to supply power to the tachs with the battery and alternator switches both off.
General
A power failure may be caused by either an engine or drive system failure and will usually be indicated by the low RPM horn. An engine failure may be indicated by a change in noise level, nose left yaw, an oil pressure light, or decreasing engine RPM. A drive system failure may be indicated by an unusual noise or vibration, nose right or left yaw, or decreasing rotor RPM while engine is increasing. In case of power failure, immediately lower collective to enter autorotation and reduce airspeed to power off Vne or below. CAUTION: Aft cyclic is required when collective is lowered at high airspeeds. CAUTION: Do not apply aft cyclic during touchdown or ground slide to prevent possible blade strike to tail cone.