Rotor Emergency Procedures Flashcards
Unusual Vibrations on Deck
1) Collective- Lower
2) PCLs- OFF
3) Rotor brake- Apply as required
Hung droop Stops
1) Reengage rotor to greater than 75% Nr
Low Rotor RPM
1) Control Nr
Main Transmission Malfunction
2 W, 3 N
If failure is imminent:
Warning- Possible indications may include: yaw attitude excursions with no control input, an increase in power required for a fixed collective setting, failure of a main generator or Hyd pump, increased noise, vibrations or abnormal fumes.
1) Land Immediately
If secondary indications are present:
2) Land ASAP
Warning- operation of the main gearbox with no oil px may result in failure of the tail drive takeoff pinion gear and result in loss of tail rotor drive
Note- consideration should be given to doing immediate landing/ditching procedure & transiting at 80 ft and 80 kias
Loss of all oil may result in unreliable temperature indications
Continued operations in precautionary range for temperature and pressure are acceptable provided they are within limits in chapter 4
Tail/Intermediate Transmission Malfunction
2 W
If failure is imminent:
1) Land Immediately
If failure is not imminent:
2) Land ASAP
Warning- High power settings require maximum performance of the tail rotor drive system and may precipitate ultimately drive failure
Warning- consideration should be given to performing immediate landing/ditching procedure and moving to an altitude sufficient to autorotation
Input Chip Caution
1 N
1) Main Transmission Malfunction emergency procedure - perform
Note- consideration should be given to returning the engine PCL to FLY
Loss of Tail Rotor Drive Altitude and Airspeed Sufficient to Establish Autorotation
1 W
1) PAC call- AUTO, AUTO, AUTO
2) Autorotation - Establish. Center tail rotor pedals.
3) Drive failure- Attempt to verify
4) Immediate Landing/Ditching emergency procedure- perform
5) PCLs - OFF when directed (prior to flare)
Warning- Attitude hold will remain engaged unless deselected.
Loss of Tail Rotor Drive Altitude and Airspeed Not Sufficient to Establish Autorotation
1) PAC call- Hover, Hover, Hover
2) Collective- Lower
3) PNAC- Hands on PCLs
4) PCLs- OFF when directed (approximately 20 to 30 ft)
Loss of Tail Rotor Control
3 W
Following the appearance of the #1 TAIL RTR SERVO caution without the associated BACKUP PUMP ON and #2 TAIL RTR SERVO ON advisories, normal yaw responses will occur that do not require excessive tail rotor performance; however, below 40 kias more pronounced effects may become apparent.
After touchdown, rapid reduction of collective or PCLs may cause excessive and uncontrollable yaw rates
1) Collective/Airspeed- Adjust as required to control yaw
Warning- If the tail rotor control cables are damaged, the hydraulic transients associated with switching the tail rotor servo from NORM to BACK UP may cause catastrophic damage to the tail rotor controls.
Tail Rotor Control Cable Failures
TAIL ROTOR QUADRANT
Land as soon as practicable
At 19500 lbs speeds of 25 and 145 will produced level flight
Below 25 or above 145 the nose will yaw right due to insufficient tail rotor thrust
In between 25 and 145 the nose will yaw left.
Heavier aircraft the numbers will be closer together
Tail Rotor Servo Failures
Normal yaw control is available between 40-120kias.
As you get closer to 40 or 120 the pedal inputs become less effective.
Execute roll on landing above 40 kias
Should feel normal on ground
