Flight Controls Flashcards
What is the only primary flight control that is not FBW?
Ailerons
What is the difference between normal mode and direct mode?
There are no higher level functions available in direct mode
What are the higher level functions associated with pitch?
- Gain on airspeed
- Elevator thrust compensation
- AOA limiting
What are the higher level functions associated with yaw?
- Yaw damp
- Turn coordination
- Gain on airspeed - as airspeed increases, rudder deflection decreases
What is the priority for the trim system?
- Backup
- Captain
- FO
- Autopilot
How is roll controlled?
Ailerons and multifunction spoilers (outer spoilers on each wing)
How many multifunction spoilers are on each wing? What are their functions?
- 5
- 3 outboard spoilers are used to assist in roll control and for ground spoilers
- 2 inboard spoilers are ground-only
When will the speed brakes automatically close even if the lever shows deployed?
- Flaps >= 2
- Airspeed , 180 kts
- TLA > 70 deg
What is the slat/flap extension/retraction sequence?
Slats extend first, flaps retract first
Will loss of airspeed data cause the flight controls to go into DIRECT mode?
Yes
Can a FCM override pilot input?
No, the pilot always has supreme control
What happens to artificial feel if flight controls are disconnected?
- Elevator- artificial feel is felt at 1/2 normal load
- Ailerons: Captain has normal feel, FO has no feel
How are the flight controls timed?
- Roll and yaw: Ailerons and rudder surfaces repositioned to a new ‘neutral position’
- Pitch: Horizontal stabilizer
Will the multi-function spoilers function in DIRECT mode?
Yes, for roll only and at a default sized gain
Will the speed brakes/ground spoilers function in DIRECT mode?
No
What happens to the flight control system when the RAT is the only AC power source?
- Horizontal stab trim operates at 1/2 speed
- Slat/flaps system operates at 1/2 speed
- Slat/flap position is limited to ‘3’ to allow adequate airspeed for the RAT
What type of flaps are on the aircraft?
Double slotted fielder flaps, 2 per wing, 4 total
What is the actuator the moves the slats and flaps? How are they powered?
PDU, power driver unit, electrically powered
What is the actuator that moves the rudder? How is it actuated?
PCU, power control unit, hydraulically actuated
What is the device that actuates the ailerons? How is it actuated and controlled?
PCU, power control unit, hydraulically actuated, controlled by conventional cables
What is the device that moves the horizontal stabilizer? How is it powered?
HSA, horizontal stabilizer actuator, electrically powered
