Flight Controls

Question 1

What is the time limit on manual trim inputs?

Answer 1

3 seconds

Question 2

What happens if half actuation of the manual trim switches persists for more than 7 seconds?

Answer 2

The switch is automatically deactivated

Question 3

How many ACEs are there?

Answer 3

9:
- 3x P-ACE
- 2x SF-ACE
- 1x HS-ACE
- 3x S-ACE

Question 4

How many channels does an ACE have?

Answer 4

2

Question 5

For each type of ACE what is config of each channel?

Answer 5

P-ACE = active/standby
SF-ACE = one for flaps and one for slats
HS-ACE = active/standby
S-ACE = each channel controls one pair of MF spoilers

Question 6

What happens when the system enters direct mode?

Answer 6

The FCM is removed from the control loop and the system reverts to fixed control laws

Question 7

What is the purpose of a power up built in test (PBIT)?

Answer 7

Detects any latent faults

Question 8

How long does the electrical PBIT take?

Answer 8

3 mins

Question 9

How long does the hydraulic PBIT test take?

Answer 9

1 min

Question 10

What is the purpose of the fly by wire backup battery?

Answer 10

Keeps the appropriate number of elevator and rudder actuators operating for at least 15 mins

Question 11

During landing and takeoff when is the tail strike avoidance system active?

Answer 11

Takeoff = below 20ft
Landing = below 70ft

Question 12

What is the priority logic for the trim switches?

Answer 12

Backup switches
Captains manual trim switches
FOs manual trim switches
Auto trim

Question 13

What happens if there is a right aileron jam?

Answer 13

FO side is jammed and the captain retains control of left aileron and pair 5 of MF roll spoilers

Question 14

What happens if there is a left aileron jam?

Answer 14

The captains half of the system is jammed and the FO retains control of the right aileron and pair 4 of MF spoilers

Question 15

In the event of an aileron disconnect who retains the artificial feel?

Answer 15

Captain

Question 16

What happens if one PCU becomes disconnected from the aileron?

Answer 16

Force authority will be halved

Question 17

What happens if the rudder pedals are jammed?

Answer 17

The rudder remains active and will be actuated by high level functions

Question 18

What happens if a rudder PCU becomes jammed?

Answer 18

The rudder will be locked at its failed position and yaw control will be established through the secondary effects of roll

Question 19

What are the two slat/flap protections?

Answer 19

Skew protection
Strike protection

Question 20

What is skew protection?

Answer 20

Prevents unacceptable differential movement of the slats/flaps

Question 21

What is strike protection?

Answer 21

Prevents excessive load on the slats/flaps

Question 22

How many attempts to move the flaps/slats does the SF-ACE allow before the PDU is de energised?

Answer 22

Initial unsuccessful attempt and then 2 more

Question 23

When in ground mode what is maximum deflection of the ground and MF spoilers?

Answer 23

Ground = 60 degrees
MF = 40 degrees

Question 24

When are ground and MF spoilers extended to their max deflections?

Answer 24

When all of the following occur simultaneously:
- WOW on ground
- wheel speed above 45kts or airspeed above 65kts
- TLA below 26 degrees

Question 25

When on ground when will the spoilers automatically retract?

Answer 25

• wheel speed is below 45kts for at least 5 seconds
  Or
• TLA above 35 degrees

Question 26

What is the maximum in flight deflection of the MF spoiler panels?

Answer 26

30 degrees

Question 27

When will the speed brakes be retracted in flight?

Answer 27

• flap 2 or greater is selected
• speed below 180kts
• TLA above 70 degrees