Helicopter quiz: Winter 2024

1. Servo transparency is also known as:
   1. jack stall
   2. servo reversibility
   3. retreating blade stall
   4. both (a) and (b)
2. Servo transparency is more likely to occur when:
   1. the helicopter is heavy
   2. the density altitude is high
   3. the airspeed is high
   4. above 1 G
   5. all of the above contribute and are compounding
3. Servo transparency occurs because:
   1. the intake for the hydraulic system is exposed to air during an unusual attitude
   2. the loads fed back into the flight control system from the rotor blades exceed the hydraulic pressure in the flight control system
   3. the pilot overpowers the hydraulic forces in the flight control system
   4. the hydraulic system runs out of fluid
4. The helicopter will respond to jack stall by:
   1. reducing collective due to the pitch rod down force on the swash plate
   2. slowing down due to flap back
   3. rolling towards the retreating blade
   4. all of the above
5. The pilot will feel servo reversibility by:
   1. the controls forces getting lighter
   2. the controls operating in their opposite sense
   3. the controls forces getting heavier or feeling frozen
   4. large aircraft vibrations
6. The recovery actions for jack stall are:
   1. reduce the severity of the manoeuvre, increase collective and adjust cyclic as control is regained
   2. reduce the severity of the manoeuvre, lower collective and adjust cyclic as control is regained
   3. increase the severity of the manoeuvre to get back to straight and level more quickly, lower collective and adjust cyclic as control is regained
   4. increase the severity of the manoeuvre to get back to straight and level more quickly, increase collective and adjust cyclic as control is regained
7. The best way to avoid servo transparency is to:
   1. slow down and fly smoothly when you are at heavy weight and high density altitude
   2. slow down and fly smoothly when you are at low weight and near sea level
   3. fly fast to spend the minimum time in the susceptible region
   4. allow enough altitude to recover from it
8. Servo transparency is found on helicopters with:
   1. dual hydraulic systems
   2. dual engines
   3. a single hydraulic system
   4. single engine
9. If a pilot is required to operate a single hydraulic system helicopter at heavy weight, fast and at high density altitude, they should:
   1. smoothly and slowly manoeuvre the helicopter
   2. mentally rehearse the recovery actions for servo transparency
   3. allow sufficient room between the helicopter and the ground to recover from a sudden unusual attitude
   4. all of the above
10. If the pilot experiences jack stall during a manoeuvre and has to recover from a large, unusual attitude, they should:
    1. terminate the flight and let the maintenance crew look over the aircraft
    2. tell your flying supervisor what happened after the day’s flying is over
    3. continue flying as if nothing happened and tell the passengers not to say anything
    4. repeat the manoeuvre to confirm it really was jack stall that caused the unusual attitude

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