Flight Controls Flashcards
Which spoilers are acting as ground spoilers?
Spoilers 1 to 4 act as ground spoilers. When the ground spoiler surface on one wing fails the symmetric ground spoiler surface on the other wing is inhibited.
What happens if you release the stick at 40 degrees of bank in normal law?
The aircraft rolls back to 33° and resumes flight path stability.
How does the elevator actuation work?
Two electrically controlled hydraulic servojacks drive each elevator. Each servojack has three control modes (active damping centering). In normal operation is one jack active the other jack is in the damping mode. Some maneuvers cause the second jack to become active.
The message WING TIP BRK ON appears on the E/WD. What does it mean?
A hydraulic device locks the flaps in their present position.
Can the crew make a flight control input that will overstress the airplane in direct law?
Yes there are no protections provided in direct law.
What are the lift devices on each wing?
Each wing has two flaps and five slat surfaces.
Is there a mechanical control for the THS available?
Mechanical control of the THS is available from the pitch trim wheel at any time if either the green or yellow hydraulic system is functioning.
Which altitude limitation is associated with high lift devices?
20,000ft
What are the levels of reconfiguration with failures in the flight control system?
Alternate law (two levels: with and without reduced protections) direct law and mechanical backup.
The speedbrakes are actually spoilers …
2 3 and 4.
Which hydraulic system drives the flaps and slats?
A power control unit (PCU) with two independent hydraulic motors and a differential gear box for the flaps (with green and yellow hydraulic power) and the slats (with green and blue hydraulic power).
What kind of flight control computers exist in the A320 family?
2 ELACs (Elevator Aileron Computer) 3 SECs (Spoiler Elevator Computer) and 2 FACs (Flight Augmentation Computer) and in addition two Flight Control Data Concentrators (FCDC).
What is the maximum elevator deflection?
The maximum elevator deflection is 30° nose up and 17° nose down.
How many flight control computers are available?
Seven flight control computers process pilot and autopilot inputs according to normal alternate or direct flight control laws.
Which computer controls the ailerons in normal operation?
The ELAC 1 controls the ailerons in normal operation. If the ELAC 1 fails the system automatically transfers aileron control to ELAC 2.
What control surfaces do the FADEC’s control?
The rudder.
What is the function of the Flight Control Data Concentrators (FCDC)?
The Flight Control Data Concentrators (FCDC) aquire data from the ELACs and SECs and send it to the electronic instrument system (EIS) and the centralized fault display system (CFDS).
What happens if one SFCC fails?
The slats and flaps are operating with half speed.
What is the maximum aileron deflection?
The maximum deflection of the ailerons is 25°. The ailerons extend 5° down when the flaps are extended (aileron droop).
Are there any control surfaces in the mechanical backup mode?
Yes, the THS and the rudder.
If both FAC’s fail what happens to the rudder limiter?
Maximum rudder deflection can be obtained after slats extended.
How many spoilers are available?
5 spoilers each side.
How does the mechanical control of the THS work?
Mechanical control of the THS is available from the pitch trim wheel at any time if either the green or yellow hydraulic system is functioning. Mechanical control from the pitch trim wheel has priority over electrical control.
Which computer controls the elevators and the horizontal stabilizer in normal operation?
In normal operations the ELAC 2 controls the elevators and the horizontal stabilizer. The green and yellow hydraulic jacks drive the left and right elevator surfaces respectively.