*Flight Controls-Flight Control Panel Flashcards
*What does ELAC stand for?
Elevator Aileron Computer
*How many ELACs are there?
2
*What are the functions of the ELAC? 7
-Control of the elevators, ailerons, and the Trimmable Horizontal stabilizer (THS).
-The ELACs compute the need for roll spoiler movement (which is sent to the SECs), and rudder yaw movement (which is sent to the FACs).
-Normal elevator, stabilizer and aileron control
-Normal pitch and roll
-Alternate pitch
-Direct pitch and roll
-Abnormal attitude
-Aileron droop
-Aquisition of autopilot orders
In the event a single ELAC should fail, what would happen?
The remaining ELAC is capable of providing complete control of the ailerons, elevators, and THS (Trimmable Horizontal Stabilizer).
*What does SEC stand for?
Spoiler Elevator Control
*How many SEC’s are installed?
3
*What functions are performed by the SECs? 6
-Normal roll (spoilers)
-Direct roll
-Alternate pitch (SEC 1 and 2 only)
-Direct pitch (SEC 1 and 2)
-Speed Brakes and Ground Spoilers (SEC 1 & 3)
-Abnormal attitude
What does a FAULT light in the SEC pb mean
The SEC is inoperative.
What do you lose when a SEC is inop?
The spoiler panels associated with the failed SEC are inoperative.
Both ELACs fail, can any of the SECs provide backup and of what functions?
SECs 1 and 2, can provide backup pitch control of the elevators and THS (Trimmable Horizontal Stabilizer). Aileron control is lost and the ailerons streamline. Roll is accomplished with just the spoilers.
*What does FAC mean?
Flight Augmentation Computer
*How many FACs are there?
2
*What are the functions of the FACs?
4
-Normal Roll (turn coordination and yaw damp)
-Rudder trim
-Rudder travel limit
-Alternate Yaw
What happens if you select a FAC pb to OFF?
Deactivates the corresponding yaw dampening and rudder trim functions to that FAC. If the FAC is still operable, it continues to compute all flight envelope functions and maneuvering speeds.
*Under Normal Law what does ELAC 1 control?
Primary- Aileron Control
Stand by-Elevator/Trimmable Horizontal Stabilizer (THS) control (backs up ELAC 2).
*Under Normal Law what does ELAC 2 control?
Primary- Elevator/Stabilizer (pitch)
Standby- Aileron control (back up ELAC 1)
*Under Normal Law, what do the 3 SECs control?
Primary- Spoiler Control
Standby- Elevator/Stabilizer control (SEC 1 & 2 back up ELACS)
*What is the sole purpose of SEC 3 in Normal Law?
Spoiler control (1 & 2 only)
*Under Normal Law, what do the FACs provide?
(YAWL)
Y-Yaw Control (Damping and turn coordination, rudder limiter, rudder trim)
A-Airspeed Protection Computation (A. Prot, hi/low limits, maneuvering speed, PFD speed scale)
W-Windshear protection (Reactive and NOT predictive)
L-Low Energy Warning Protection (SPEED, SPEED, SPEED)
*Is full rudder deflection available during all flight regimes?
No. It is limited as a function of speed
*How are the flight control surfaces controlled and actuated?
All surfaces are controlled electronically and actuated hydraulically
*When is auto pitch trim available?
In flight under Normal Law with bank angles less than 33 degrees with or without autopilot.
*How is roll control normally achieved?
1 aileron and 4 spoilers per wing
*If both FACs fail, is maximum rudder deflection available?
Yes, after slat extension.
