Flight Controls Flashcards
How does the pilot override in order to interrupt the stick pusher?
Pressing and holding the MSTR DISC (not applicable for EASA certified aircraft)
With flaps extended, which MFSs are available?
Only the two inboard pair of MFS
What are the functions of the multifunction spoilers (MFSs)?
Roll assist, proportional lift dumping, ground lift dumping, combination roll assist, and proportional lift dumping
Which hydraulic systems
power the elevator power
control units (PCUs)?
Left elevator – systems 1 and 3,
right elevator – systems 2 and 3
How many spoiler panels are located on each wing?
Four multifunctional spoilers (MFS),
two ground spoilers (GS)
What does the master disconnect (MSTR DISC)
switch do when pressed?
Provides a disconnect command to the AFCS, disconnects pitch trim and stall pusher while the switch is held (no pusher disconnect
for EASA certified A/C).
How are the aileron control circuits separated in response to a jammed control system?
Operable control wheel overpowers the jam via a roll disconnect mechanism in the torque tube
Will a flap failure prevent operation of the slats?
No. The flaps and slats are two independent
dual motor assemblies.
When is the yaw damper engaged by the flight
guidance computer?
After the first engine start
What inputs activate the STAB trim?
Manual trim (pilot overrides copilot), auto trim (autopilot 1 or 2), Mach trim (autopilot off)
How are the primary flight controls controlled and actuated?
Mechanically controlled and hydraulically actuated
During landing, when will the ground spoilers deploy?
Throttles at idle or below and two of the following three conditions:
RA below 7 ft,
one main landing gear WOW,
one wheel speed greater than 16 kt
Which hydraulic systems power
the aileron power control units (PCUs)?
Left aileron – systems 1 and 3,
right aileron – systems 2 and 3
Once disconnected, can the ailerons be
reconnected in flight?
No. The system must be reset by maintenance.
How is symmetrical lift dumping ensured when an MFS panel failure is detected?
The opposite panel is automatically disabled
How is the pilot alerted if the aileron, rudder, or
stabilizer trim is outside the allowable range, and the throttles are advanced for takeoff?
Applicable EICAS warning message accompanied by the “No Takeoff” voice message
How is the slats/flaps operation controlled?
By two independent slat/flap control units (SFCUs)
Under which two conditions will the stabilizer in motion aural clacker sound?
Stabilizer runaway, stab trim switch held for an extended period
What is the purpose of the FLAPS switch on the
TAWS/SMS panel?
Mute the flap aural warning if the flaps are not in the correct landing configuration
Which hydraulic systems power the rudder power control units (PCUs)?
Hydraulic systems 1, 2, and 3
