Flight Controls

Question 1

How does the pilot override in order to interrupt the stick pusher?

Answer 1

Pressing and holding the MSTR DISC (not applicable for EASA certified aircraft)

Question 2

With flaps extended, which MFSs are available?

Answer 2

Only the two inboard pair of MFS

Question 3

What are the functions of the multifunction spoilers (MFSs)?

Answer 3

Roll assist, 
proportional lift dumping, 
ground lift dumping, 
combination roll assist, and 
proportional lift dumping

Question 4

Which hydraulic systems
power the elevator power
control units (PCUs)?

Answer 4

Left elevator – systems 1 and 3,

right elevator – systems 2 and 3

Question 5

How many spoiler panels are located on each wing?

Answer 5

Four multifunctional spoilers (MFS),

two ground spoilers (GS)

Question 6

What does the master disconnect (MSTR DISC)

switch do when pressed?

Answer 6

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).

Question 7

How are the aileron control circuits separated in response to a jammed control system?

Answer 7

Operable control wheel overpowers the jam via a roll disconnect mechanism in the torque tube

Question 8

Will a flap failure prevent operation of the slats?

Answer 8

No. The flaps and slats are two independent

dual motor assemblies.

Question 9

When is the yaw damper engaged by the flight

guidance computer?

Answer 9

After the first engine start

Question 10

What inputs activate the STAB trim?

Answer 10

Manual trim (pilot overrides copilot), 
auto trim (autopilot 1 or 2), 
Mach trim (autopilot off)

Question 11

How are the primary flight controls controlled and actuated?

Answer 11

Mechanically controlled and hydraulically actuated

Question 12

During landing, when will the ground spoilers deploy?

Answer 12

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

Question 13

Which hydraulic systems power

the aileron power control units (PCUs)?

Answer 13

Left aileron – systems 1 and 3,

right aileron – systems 2 and 3

Question 14

Once disconnected, can the ailerons be

reconnected in flight?

Answer 14

No. The system must be reset by maintenance.

Question 15

How is symmetrical lift dumping ensured when an MFS panel failure is detected?

Answer 15

The opposite panel is automatically disabled

Question 16

How is the pilot alerted if the aileron, rudder, or

stabilizer trim is outside the allowable range, and the throttles are advanced for takeoff?

Answer 16

Applicable EICAS warning message accompanied by the “No Takeoff” voice message

Question 17

How is the slats/flaps operation controlled?

Answer 17

By two independent slat/flap control units (SFCUs)

Question 18

Under which two conditions will the stabilizer in motion aural clacker sound?

Answer 18

Stabilizer runaway, stab trim switch held for an extended period

Question 19

What is the purpose of the FLAPS switch on the

TAWS/SMS panel?

Answer 19

Mute the flap aural warning if the flaps are not in the correct landing configuration

Question 20

Which hydraulic systems power the rudder power control units (PCUs)?

Answer 20

Hydraulic systems 1, 2, and 3