Flight Controls Flashcards
How does a side stick input get relayed to the control surfaces?
Electrically controlled, hydraulically activated
What 2 control surfaces can be mechanically controlled?
Trimmable Horizontal Stabiliser (THS) and Rudder.
The cable moves a hydraulic valve which in turn moves the control surfaces
How many spoilers and slats do you have on each wing?
5 spoilers on each wing (10 all together)
5 slats on each wing (10 all together)
How many ELACs?
Elevator Aileron Computers
2
What are ELACs used for?
Normal Elevator and Stabiliser control
Aileron control
How many SECs are there?
Spoiler Elevator Computers
3
What are SECs used for?
Spoilers control
Standby Elevator and Stabiliser Control
How many FACs?
Flight Augmentation Computers
2
What are FACs used for?
Electric rudder control
How many FCDCs
Flight Control Data Concentrators
2
What do the FCDCs do?
Acquire data from the Elevator Aileron Computers (ELACs) and Spoiler Elevator Computers (SECs) and send it to the electronic instrument system (EIS) and centralised fault display system (CFDS).
What are the THREE control modes of the electrically controlled hydraulic servo jacks?
ACTIVE - the jack is electrically controlled
DAMPING - the jack follows surface movement
CENTERING - the jack is hydraulically locked in the neutral position
What is aileron droop?
When flaps are extended, the ailerons deflect 5° down to provide extra lift.
RTO - If the ground spoilers are ARMED and the wheel speed exceeds 72kts, the ground spoilers will auto extend as soon as…
both thrust levers are set to idle.
RTO - If the ground spoilers are NOT ARMED and the wheel speed exceeds 72kts, the ground spoilers will auto extend as soon as…
Reverse is selected on one engine
(the other thrust lever remains at idle)
On landing, with the speed brake lever NOT in the retracted position or ground spoilers ARMED the ground spoilers will automatically extend fully when…..
Both main landing gears on ground and
Both thrust levers at or below idle, OR reverse selected on at least one eng (other below MCT position)
On landing, with the speed brake lever in the retracted position but ground spoilers NOT ARMED the ground spoilers will automatically extend fully when…..
Both main landing gears on ground and
Reverse selected on at least one eng (other below MCT position)
How many SFCCs?
Slat and Flap Control Computer
2
If we lose one SFCC, what impact will this have on the flap operation?
Half speed operation
How many flap positions?
5
0,1,2,3,FULL
In NORMAL LAW what is Ground mode?
Sidestick movement directly related to elevator deflection.
No auto trim
During take off when is FLIGHT MODE activated
When Pitch >8°
0.5s for lateral control transition
5s for pitch control
Protections in FLARE MODE
High AoA
To perform a > 33° bank turn what additional sidestick input must be made?
Constant lateral input
Back pressure to maintain level flight
