Flight Controls Flashcards
Which hydraulic systems actuate the ailerons?
Ailerons are hydraulically actuated by the jacks which are powered by the green and blue systems. One system works at a time, the green is the primary system.
Which flight computers control the ailerons?
Controlled by ELAC 1. If ELAC 1 fails ELAC 2 takes over. It both ELACs fail, the SEC can provide roll via the spoilers.
Which spoilers are used for ground lift dumping?
All 5 pairs of spoilers.
Which spoilers are used for the speedbrakes?
Spoilers 2, 3, 4.
When will the spoilers automatically fully deploy during the landing phase?
Both main gears on the ground and the thrust levers at idle. If not armed, the spoilers deploy when reverse thrust is selected.
If a spoiler is deployed and a hydraulic system fails, what happens?
The spoiler will maintain its last position at the time of failure.
How does the rudder travel limiter function?
At high speeds it prevents large rudder movements by restricting the rudder movement range, reducing excess strain on the fuselage. 2 motors control the rudder trim and artificial feel unit.
If the rudder travel limiter fails in flight, what is the consequence?
The last setting will be maintained. When slats are extended, the travel limiter motors at low speed to allow full rudder deflection for approach and landing.
What conditions cause speedbrake inhibition?
CONFIG FULL, TOGA, AOA Protection, Elevator Fault, SEC 1 & 3 Fault.
What speed will the spoilers deploy in a rejected take off?
Above 72kts.
What is phased lift dumping?
At touchdown with the thrust levers at idle and one main gear still airborne and one on the ground, spoilers partially deploy on the airborne side to force the wing and gear down.
How many slats and flaps are there?
5 leading edge slats, 2 trailing edge flaps.
If one of the hydraulic inputs or computers fail, what is the effect on flight controls?
They will travel at half speed.
If the side stick is released at Alpha Max, what happens?
Attitude will return to Alpha Prot.
What does the AOA protection give protection against?
Stalling and windshear.
How do you recover if alpha floor activates?
Press the instinctive pb on the thrust levers. Move the thrust levers out of the CLB gate, or put them in the CLB gate and reinstate the ATHR using the FCU pb.
If you press the instinctive pb on the thrust levers for more than 15s, what happens?
Auto thrust is disengaged for the remainder of the flight. Alpha floor is not available.
Does Alpha Floor work in Alternate Law?
No.
What is the load alleviation function?
An automatic function in normal law when in clean flight. Loads on the wing can be unloaded by inverting the ailerons and deploying the spoilers.
What is the MAX bank angle in Normal Law?
67’
What happens at Max bank angle when the side stick is released?
Aircraft returns to 33’ angle of bank.
Centering the beta target when single engine provides what?
Minimum drag / best climb performance.
Max roll rate in Normal Law?
15’ per second.
What is the low energy warning?
Active below 2000ft rad alt in CONFIG 2, 3 or FULL in Normal Law. It warns the pilots of a low energy situations developing before Alpha Prot and Alpha Floor are triggered, giving the pilots time to react. The audio calls ‘SPEED SPEED SPEED’ will be heard.
