Vietje Rotors, Transmissions, And Drive Systems

Front 1

Loss of tail rotor thrust in cruise flight

Back 1

1. Airspeed - adjust to 80KIAS or above.
2. AUTOROTATE - Maintain airspeed at or above 80 KIAS
3. ENG POWER CONT levers - OFF (during deceleration when intended point of landing is assured)

Front 2

Loss of tail rotor thrust at low airspeed or hover (Right Rotation)

Back 2

-Collective should be adjusted so that an acceptable compromise between rate of turn and descent is maintained. 5 to 10 feet above touchdown initiate a hovering autorotation by moving the engine power control levers - off.
1. Collective - Reduce
2. ENG POWER CONT levers - OFF (5 to 10 feet above touchdown)

Front 3

T/R QUAD FAIL Caution with loss of aircraft control (Right Rotation)

Back 3

-Collective should be adjusted so that an acceptable compromise between rate of turn and descent is maintained. 5 to 10 feet above touchdown initiate a hovering autorotation by moving the engine power control levers - off.
1. Collective - Reduce
2. ENG POWER CONT levers - OFF (5 to 10 feet above touchdown)

Front 4

T/R QUAD FAIL CAUTION appears in cruise flight WARNING

Back 4

If the helicopter is shutdown and/or hydraulic power is removed with one tail rotor cable failure, disconnection of the other tail rotor cable will occur when force from the boost servo cannot react against control cable quadrant spring tension. The Quadrant spring will displace the cable enough to unlatch the quadrant cable.

Front 5

T/R QUAD FAIL CAUTION appears in cruise flight

Back 5

-Loss of one cable, no change in handling characteristics.
-Loss of both cables, a centering spring will position the tail to 10 1/2 degrees of pitch. This will allow trimmed flight at 25 to 145 KIAS (depending on gross weight). Right yaw can be controlled by reducing collective. Left Yaw can be controlled by increasing collective.

1. Collective - Adjust to determine controllability(Fixed right or left)
2. Land as soon as practicable

Front 6

Loss of tail rotor thrust or T/R QUAD FAIL Caution Appears or Loss of Control at Low Airspeed/Hover (Left Rotation) WARNING

Back 6

Reducing collective in a left rotation will increase rate of turn with engine power control levers at fly depending on the rate at which the ENG POWER CONT levers are retarded. It is critical that the pilot on the controls maintain a level attitude, preserve NR, and apply cushion for landing.

Front 7

Loss of tail rotor thrust or T/R QUAD FAIL Caution Appears or Loss of Control at Low Airspeed/Hover (Left Rotation)

Back 7

1. ENG POWER CONT lever(s) - Retard to begin a partial power descent
2. Collective - Adjust to preserve NR
3. ENG POWER CONT levers - OFF (5 to 10 feet above touchdown)
4. Collective - Adjust for landing

Front 8

Pedal Bind/Restriction or Drive With No Accompanying Caution.

Back 8

-Yaw Hard Over Fail will increase pedal force as much as by 250 pounds.
1. Apply force to oppose the drive
-Check other pedals for proper operation
-Tail Servo Switch - Backup
If Norm Authority is not restored
-Tail Servo Switch - Normal
-SAS/BOOST switch - Off
If Normal Forces are not restored
-SAS/Boost switch - ON
-Collective - Adjust to determine controllability for landing.
-Land as soon as practicable.

Front 9

T/R SERVO 1 FAIL Caution Appears and BACK UP PUMP ON or T/R SERVO 2 ON Does not appear.

Back 9

1. TAIL SERVO switch - BACKUP
-BACKUP HYD PUMP switch - ON
-Land as soon as practicable

Front 10

MAIN XMSN PRESS Caution Appears/MAIN XMSN OIL HOT Caution

Back 10

1. LAND AS SOON AS POSSIBLE
If time permits
-Slow to 80 KIAS
3. EMER APU START
-GENERATORS NO. 1 and NO. 2 switches - OFF

Front 11

CHIP L INPUT MDL or CHIP R INPUT MDL Caution Appears

Back 11

1. Establish single engine airspeed.
2. ENG POWER CONT lever (affected engine) - IDLE
3. LAND AS SOON AS POSSIBLE

Front 12

CHIP MAIN MDL SUMP Caution Appears

Back 12

1. LAND AS SOON AS POSSIBLE

Front 13

CHIP L ACC MDL or CHIP R ACC MDL Caution Appears

Back 13

1. LAND AS SOON AS POSSIBLE

Front 14

TAIL XMSN OIL HOT Caution Appears

Back 14

1. LAND AS SOON AS POSSIBLE

Front 15

CHIP INT XMSN Caution Appears

Back 15

1. LAND AS SOON AS POSSIBLE

Front 16

INT XMSN OIL HOT Caution Appears

Back 16

1. LAND AS SOON AS POSSIBLE

Front 17

Main Transmission Failure WARNING

Back 17

If NR decreases from 100% to 96% with an increase in Q during steady flight with no engine malfunction, the main transmission planetary carrier may have failed. During a main transmission planetary carrier failure, it may be impossible to maintain NR at 100%

Front 18

Main Transmission Failure NOTE

Back 18

Decreasing NR may be accompanied by a drop in transmission oil pressure of 10 psi or more, and possible unusual helicopter vibrations.

Front 19

Main Transmission Failure

Back 19

1. Collective - Adjust only enough to begin a descent with remaining power applied to the main transmission throughout the descent and landing.
2. LAND AS SOON AS POSSIBLE.