Emergency Procedures Flashcards
Power failure between 8 feet and 500 feet AGL.
- lower collective immediately to maintain rotor RPM.
- Adjust collective to keep rpm between 97 and 108% or apply full down collective if lightweight prevent attaining above 97%.
- maintain airspeed until ground ground is approached, then begin cyclic flair to reduce rate of descent and forward speed.
- at about 8 feet AGL, apply forward cyclic to level ship and raise collective just before touchdown to cushioned landing.touchdown and level attitude and nose straight ahead.
What do you do during a power failure?
- immediately lower collective to enter autorotation and reduce airspeed to power off Vne or below.
- Aft Cyclic is required when collective is lowered at high-speed.
- do not apply aft cyclic during touchdown or ground slide to prevent possible blade strike to tailcone.
Loss of tail rotor thrust during hover.
- failure is usually indicated by right yaw which cannot be stopped by applying left pedal.
- immediately roll throttle off into detent spring and allow aircraft to settle.
- raise collective just before touchdown to cushion landing.
Engine fire during start on ground.
- If cranking continue an attempt to start which would suck flames and excess fuel into engine.
- if engine starts, run 60 to 70% RPM for a short time, shut down, and inspect for damage.
- if engine fails to start, shut off fuel and master battery switch.
- extinguish fire with fire extinguisher, wool blanket or dirt.
- inspect for damage.
Fire in flight
- enter autorotation
- master battery switch off (if time permits)
- cabin heat off
- cabin vent on
- if engine is running, perform normal landing and immediately shut off fuel valve.
- if engine stops running, shut off fuel valve and execute autorotation landing.
Power failure below 8 feet AGL.
- Apply right pedal as required to prevent yawing.
- allow rotorcraft to settle.
- raise collective just before touchdown to cushion landing.
What’s the definition of land immediately?
Land on the nearest clear area where a safe normal landing could be performed. Be prepared to enter auto rotation during reproach if required
What is the definition of land as soon as practical?
Landing site is that pilots discretion based on nature of problem and available landing areas. Flight beyond nearest airport is not recommended.
Power failure above 500 feet AGL
- lower collective mediately to maintain rotor rpm
- Establish a steady glide at approximately 70 Kia’s for maximum glad distance or minimum rate of descent
- Adjust collective to keep rpm between 97 and 108% or apply fold-down collective if lightweight prevent attaining about 97%
- Select landing spot and if altitude permits maneuver so landing will be into wind
- A restart may be attempted at pilots discretion if sufficient time is available
- If unable to restart, turn unnecessary switches and fuel valve off
- At about 40 feet AGL, begin cyclic flair to reduce rate of descent and forward speed
- At about 8 feet AGL, apply forward cyclic to level ship and raise collective just before touchdown to cushion landing. Touchdown and level attitude with no straight ahead.
Maximum glide distance configuration
- Airspeed approximately 90 KIAS
- Rotor RPM approximately 90%
- Best Glide ratio is about 4.7:1 nautical mile per 1300 feet AGL
Minimum rate of descent configuration
- Airspeed approximately 50 KIAS
- Rotor RPM approximately 90%
- Minimum rate of descent is about 1350 ft./m. glide ratio is about 4:1 or one nautical mile per 1500 feet AGL
Note: increase rotor RPM to 97% minimum when auto rotating below 500 feet AGL
Air restart procedure
Caution: do not attempt restart of engine malfunction is suspected or before safe auto rotation is established. Air restarts not recommended below 2000 feet AGL
- Mixture – off
- Throttle – closed
- Starter – engaged
- Mixture – move slowly Rich while cranking
Emergency water landing – power off
- Follow same procedure as for power failure overland until contacting water. If time permits, unlatch doors prior to water contact.
- Apply lateral cyclic when aircraft contacts water to stop rotors.
- Really seatbelt and quickly clear aircraft one rotor stop.
Emergency water landing – power on
- Descend a hover above water.
- Unlatch doors.
- Passengers exit aircraft.
- Fly to safe distance from passengers to avoid possible injury by rotors.
- Switch battery and alternator off.
- Roll throttle off into over travel spring.
- Keep aircraft level and apply full collective as aircraft contacts water.
- Ply lateral cyclic to stop rotors.
- Release seatbelt and quickly clear aircraft when rotors stop.
Loss of tail rotor thrust during forward flight
- Failure is usually indicated by nose right yaw which cannot be corrected by applying left pedal.
- Immediately enter auto rotation.
- Maintain at least 70 KIAS if practical
- Select landing site, roll throttle off into detent spring, and perform autorotation landing.
Note: When a suitable landing site is not available, the vertical fin may permit limited controlled flight at low power settings and airspeeds above 70 KIAS; however, prior to reducing airspeed, reenter full autorotation.
