Flight Controls Flashcards
What type of flight control system does the A350 use?
Fly-by-wire system.
How are the flight control surfaces controlled and actuated?
Electrically controlled and hydraulically actuated.
What are the sources of actuation for the flight control surfaces?
One or both hydraulic systems, or an independent hydraulic source (EHA/EBHA).
How many electric motors does the stabilizer have?
Two electric motors.
What input device does the pilot use to manually fly the aircraft?
The sidestick.
What do the flight control computers do with pilot inputs?
Interpret them and order flight control surface movements as necessary.
What are the trimming devices available to the pilot?
PITCH TRIM switch and RUDDER TRIM selector with a rudder trim RESET pushbutton.
What does normal law prevent?
Excessive maneuvers and exceedance of the safe envelope in pitch, roll, and yaw.
What components are used for pitch control?
Two elevators and the Trimmable Horizontal Stabilizer (THS).
What components are used for roll control?
Four ailerons and ten spoilers.
What component is used for yaw control?
One rudder.
What components are used for speed brake and ground spoiler functions?
Fourteen spoilers.
What components are used for lift augmentation?
Fourteen slats, four flaps, and four ailerons.
How many flight control computers does the A350 have?
Six.
What types of flight control computers are used?
Three PRIMs and three SECs.
What is the role of the master PRIM computer?
Computes orders and sends them to other computers for execution.
What happens if PRIM 1 fails?
PRIM 2 becomes the master.
What happens if all PRIMs fail?
All operative SECs compute and perform orders independently.
Is there a master SEC in case all PRIMs fail?
No, there is no master SEC.
