7. FLT CTL Flashcards
ELAC 1 P/B
Controls the Elevator and Aileron Control (ELAC) Computer 1(2).
On (lights out):
ELAC 1(2) performs the following functions:
Normal pitch and roll
Alternate pitch
Direct pitch and roll
Abnormal attitude
Aileron droop
Acquisition of autopilot orders
OFF:
When pressed the corresponding computer is no longer active. The OFF light will come on. Switching it OFF, then ON, resets the computer.
FAULT Light:
Comes on amber, along with an ECAM caution:
When a failure is detected
During ELAC power-up test (eight seconds)
NOTE: The ELAC power-up test occurs when electrical power is turned on, or after the occurrence of an electrical transient lasting longer than 25 milliseconds. The FAULT light goes off, when the pilot selects OFF, or at the end of the ELAC power-up test if its results are satisfactory.
SEC 1 P/B
Controls the spoiler and elevator (SEC) computers 1(2)(3).
On (lights out):
SEC 1(2)(3) performs the following functions:
Normal roll (by controlling the spoilers)
Speed brakes and ground spoilers
Alternate pitch (SEC 1 and SEC 2 only)
Direct pitch (SEC 1 and SEC 2 only)
Direct roll
Abnormal attitude.
OFF:
When pressed the corresponding computer is no longer active. The OFF light will come on. Switching it OFF, then ON, resets the computer.
FAULT Light:
Comes on amber, along with an ECAM caution, when a failure is detected. The FAULT light goes off, when the pilot selects the pushbutton OFF.
FAC 1 P/B
On (lights out):
The aircraft has two flight augmentation computers (FACs) that perform four main functions:
Yaw function
Yaw damping and turn coordination
Rudder trim
Rudder travel limitation
Flight envelope function
PFD speed scale management
Minimum/maximum speed computation
Maneuvering speed computation
Alpha-floor protection
Low-Energy Warning function
Windshear detection function
In performing these functions the FAC uses independent channels:
Yaw damper
Rudder trim
Rudder travel limit
Flight envelope
Each FAC interfaces with the elevator aileron computers (ELACs) when the APs are disengaged, or with the FMGS when at least one AP is engaged. Both FACs engage automatically at power-up. The pilot can disengage or reset each FAC (in case of failure) by means of a pushbutton on the flight control overhead panel. When a FAC is disengaged (FAC pushbutton set off) but still valid, the flight envelope function of the FAC remains active. If both FACs are valid, FAC1 controls the yaw damper, turn coordination, rudder trim, and rudder travel limit, and FAC2 is in standby. FAC1 keeps the aircraft within the flight envelope through FD1; FAC2 performs this function through FD2. If a failure is detected on any channel of FAC1, FAC2 takes over the corresponding channel.
OFF:
When pressed the corresponding computer is no longer active. The OFF light will come on. Switching it OFF, then ON, resets the computer.
FAULT Light:
Lights up in amber, along with a caution on ECAM, when a failure is detected. The FAULT light goes out when the pilot selects OFF.
