Main/tail Rotor Flashcards

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1
Q

Symptom:

  1. If NR greater than or equal to 380 rpm (10 Hz chopped tone)
A

NR OVERSPEED

Corrective Action:

  1. REDUCE NR TO WITHIN LIMITS, WHEN ABLE.

If NR less than 420 rpm:
2. continue flight as appropriate.

If NR greater than or equal to 420 rpm:
2. land as soon as practicable.

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2
Q

Symptoms:

  1. NR HI caution light illuminated with NR switch in NORMAL.
  2. NR greater than or equal to 365 rpm with the NR switch in NORMAL.
A

VARIABLE NR MALFUNCTION

Corrective Action:

  1. airspeed - less than 135 KIAS.
  2. angle of bank - 40 degrees maximum.
  3. abort mission.
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3
Q

Symptoms:

  1. NR gauge fluctuates abnormally or indicates zero.
A

NR INDICATING SYSTEM FAILURE

Corrective Action:

  1. monitor operable NR indicator or CDU ASE page.
  2. continue flight as appropriate.

If both NR gauges fail and no NR indication on CDU:
3. abort mission.

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4
Q

Symptom:

  1. Any uncommanded left yaw not attributable to mechanical failure of the tail rotor drive system.
A

UNCOMMANDED LEFT YAW (ULY)

Corrective Action:

  1. IMMEDIATE FULL RIGHT PEDAL
  2. ALTITUDE/OBSTACLE PERMITTING, SMOOTHLY APPLY FORWARD CYCLIC TO INCREASE FORWARD AIRSPEED.
  3. ALTITUDE PERMITTING, REDUCE COLLECTIVE.
  4. NR SWITCH - HIGH.
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5
Q

Symptom:

  1. GB CHIP warning light illuminated and a TGB CHIP annunciation on the VEMD caution/fuel page.
A

TGB CHIP

Corrective action:

  1. ESTABLISH SAFE ALTITUE/AIRSPEED FOR POSSIBLE LOSS OF TAIL ROTOR THRUST.
  2. LAND AS SOON AS POSSIBLE.
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6
Q

Possible symptoms:

  1. GB CHIP warning light illuminated (loss of thrust) with a TGB CHIP annunciation on the VEMD caution/fuel page.
  2. uncommanded yaw to the left or right.
  3. tail rotor pedals moveable without effect ( loss of thrust).
  4. abnormal vibrations or noise from the tail section ( loss of thrust or fixed pitch).
  5. cannot move pedals ( fixed pitch).
A

LOSS OF TAIL ROTOR THRUST IN FORWARD FLIGHT OR FIXED TAIL ROTOR PITCH

Corrective Action:

  1. DIRECTIONAL CONTROL - MAINTAIN USING CYCLIC AND COLLECTIVE.
  2. land as soon as practicable. Utilize the appropriate procedure for landing with a tail rotor malfunction.
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7
Q

POWERED LANDING WITH TAIL ROTOR MALFUNCTION:

A
  1. Landing/hover checklist - complete.
  2. approach angle/speed - as required to maintain right yaw ( left sideslip).
  3. touchdown - aligned with runway, eliminate yaw and drift.
  4. rollout - coordinate cyclic and collective to maintain directional control and reduce ground speed.
  5. brakes - apply as required.
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8
Q

Symptom:

  1. IMMEDIATE, rapid left yaw acceleration.

Possible symptoms:

  1. tail rotor pedals moveable but with no apparent effect.
  2. abnormal vibrations or noise from the tail section.
  3. GB CHIP warning light illuminated and a TGB CHIP annunciation on the VEMD caution/fuel page.
A

LOSS OF TAIL ROTOR THRUST WHILE HOVERING

Corrective Action:

  1. ESFL - BOTH OFF.
  2. MAINTAIN LANDING ATTITUDE.
  3. COLLECTIVE - CUSHION THE LANDING.
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