Emergency Procedures Flashcards
Define Land Immediately
Land on the nearest clear area where
a safe normal landing can be performed. Be prepared to
enter autorotation during approach, if required.
Define Land as soon as practical
Landing site is at pilot’s
discretion based on nature of problem and available landing
areas. Flight beyond nearest airport is not recommended.
What is required when collective is lowered at high air speed
Aft Cyclic
Why don’t you apply aft cyclic during touchdown or ground slide
To prevent possible blade strike
to tailcone
Engine Failure Indications
change in noise level, nose left yaw, an oil pressure light,
or decreasing engine RPM
Drive System Failure Indications
unusual noise or vibration, nose right
or left yaw, or decreasing rotor RPM while engine RPM is
increasing
What is a power failure usually indicated by
Low RPM horn
POWER FAILURE ABOVE 500 FEET AGL
- Lower collective immediately to maintain rotor RPM.
- Establish a steady glide at approximately 70 KIAS.
- Adjust collective to keep RPM between 97 and 108%
or apply full down collective if light weight prevents
attaining above 97%. - Select landing spot and, if altitude permits, maneuver
so landing will be into wind. - A restart may be attempted at pilot’s discretion if
sufficient time is available - If unable to restart, turn unnecessary switches and fuel
valve off. - At about 40 feet AGL, begin cyclic flare 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.
Touch down in level attitude with nose straight ahead.
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 light weight prevents
attaining above 97%. - Maintain airspeed until ground is approached, then begin
cyclic flare 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.
Touch down in level attitude with nose straight ahead.
POWER FAILURE BELOW 8 FEET AGL
- Apply right pedal as required to prevent yawing.
- Allow helicopter to settle.
- Raise collective just before touchdown to cushion
landing.
MAXIMUM GLIDE DISTANCE CONFIGURATION
- Airspeed approximately 90 KIAS.
- Rotor RPM approximately 90%.
Best glide ratio is about 4.7:1 or one nautical mile per
1300 feet AGL.
MINIMUM RATE OF DESCENT CONFIGURATION
- Airspeed approximately 55 KIAS.
- Rotor RPM approximately 90%.
Minimum rate of descent is about 1350 feet per minute.
Glide ratio is about 4:1 or one nautical mile per 1500 feet
AGL.
AIR RESTART PROCEDURE
CAUTION
Do not attempt restart if engine malfunction
is suspected or before safe autorotation is
established.
- Mixture – full rich.
- Throttle – closed, then cracked slightly.
- Actuate starter with left hand.
EMERGENCY WATER LANDING – POWER OFF
- Follow same procedures as for power failure over land
until contacting water. If time permits, unlatch doors
prior to water contact. - Apply lateral cyclic when aircraft contacts water to stop
rotors. - Release seat belt and quickly clear aircraft when rotors
stop.
EMERGENCY WATER LANDING – POWER ON
- Descend to 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 overtravel spring.
- Keep aircraft level and apply full collective as aircraft
contacts water. - Apply lateral cyclic to stop rotors.
- Release seat belt and quickly clear aircraft when rotors
stop.
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 overtravel
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
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 overtravel spring and
allow aircraft to settle.
2. Raise collective just before touchdown 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.
ENGINE FIRE DURING START ON GROUND
- Cranking – Continue and attempt to start which would
suck flames and excess fuel into engine. - If engine starts, run at 60-70% RPM for a short time.
- Fuel mixture – OFF.
- Fuel valve – OFF.
- Battery switch – OFF.
- If time permits, apply rotor brake to stop rotors.
- Exit helicopter.
ENGINE FIRE IN FLIGHT
- Enter autorotation.
- Cabin heat – OFF (if time permits).
- Cabin vent – ON (if time permits).
- If engine is running, perform normal landing, then pull
fuel mixture OFF and shut fuel valve OFF.
If engine stops running, shut fuel valve OFF and
complete autorotation landing. - Battery switch – OFF.
- If time permits, apply rotor brake to stop rotors.
- Exit helicopter.
ELECTRICAL FIRE IN FLIGHT
- Battery and alternator switches – OFF.
- Open cabin vents.
- Land immediately.
- Pull fuel mixture OFF and shut fuel valve OFF.
- If time permits, apply rotor brake to stop rotors.
- Exit helicopter.
NOTE
Low RPM warning system and governor
are inoperative with battery and alternator
switches both off.
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.
HYDRAULIC SYSTEM FAILURE
Hydraulic system failure is indicated by heavy or stiff
cyclic and collective controls. Loss of hydraulic fluid
may cause intermittent 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.
