Flight Controls Flashcards
Which Power Control Unit (PCU) is the Captains control wheel connected to?
Aileron PCU.
Which Power Control Unit (PCU) is the First Officers control wheel connected to?
Spoiler PCU.
What system allows actuation of both the ailerons and spoilers by either control wheel?
Cable Drive System.
If the aileron control system is jammed, how is roll control provided?
By spoilers using the First Officers control wheel.
If the spoiler system is jammed how is roll control provided?
By the ailerons using the Captains control wheel.
Can you trim the ailerons with the autopilot engaged?
No.
How much control wheel deflection (approx.) will initiate the spoilers for roll control?
10°
How many flight spoilers are located on each wing?
4.
How are aerodynamic forces transmitted to the control columns for the elevator?
Via the elevator feel and centring unit.
At what Mach number will the Mach Trim System automatically commence?
Mach .615
The trailing & leading edge flaps & slats are powered by which hydraulic system?
System B.
What does illumination of the FEEL DIFF PRESS light indicate?
A failure of either hydraulic system or elevator feel pitot system.
What are the two speed modes that the stabiliser trim utilises?
High speed, flaps extended.
Low speed, flaps retracted.
What are the 4 conditions that the Speed Trim System will come into effect under?
(i) Low weight
(ii) Aft CG
(iii) High thrust
(iv) Autopilot disengaged
What system controls the Yaw Damping functions?
The Stall Management/Yaw Damper computers.
Above approximately what speed will rudder authority be automatically reduced?
135kts.
Which hydraulic system does the main Yaw Damper utilise?
System B.
After a loss of hydraulic pressure, the Yaw Damper switch will disengage. When can you reset the switch to on?
After you have selected both FLT CONTROL switches to STBY RUD.
What type of trailing edge flaps are fitted?
Double slotted flaps.
Which side does the Flap Load Relief system draw speed information from?
The Captains.
Which hydraulic system primarily powers the autoslats?
System B.
When using alternate flap extension, which hydraulic system powers the LE Flaps?
The Standby hydraulic system.
Can the LE devices be retracted using the standby hydraulic system?
No.
Which switch operates the TE flaps if Hydraulic System B fails?
ALTERNATE FLAPS master switch.
What monitors the position of the LE and TE devices?
The Flap Slat Electronics Unit (FSEU).
Are the TE Flaps extended/retracted during Alternate Extension electrically or hydraulically?
Electrically.
What are the 4 ways the STBY RUD can be activated?
(i) Manually
(ii) Automatically
(iii) FFM
(iv) Alternate Flap
What is the purpose of the Force Fight Monitor (FFM)?
It detects opposing forces between the System A & B actuators to automatically pressurise the standby rudder PCU to help retain adequate rudder control.
