Flight Control Computers
Flight Augmentation Computers
FAC - The Flight Augmentation Computers have three main functions:
- Rudder trim
- Rudder travel limits
- Yaw damping inputs
- Alternate yaw
- Flight envelope and speed computations
- Wind shear detection
When both FACs are operational, FAC 1 is primary, and FAC 2 is standby.
ON - When the associated flight control computer switch is ON, it engages the computer and lights are extinguished.
RESET - Turning the computer OFF then ON resets the computer.
OFF - When selected to OFF, the OFF light illuminates white and disengages the associated computer.
FAULT - The associated FAULT Light illuminates amber:
- When a failure is detected
- During computer's power-up test (8-second duration). This test occurs for each flight control computer upon electrical power application or after electrical transient/interruption.
The FAULT light extinguishes when OFF is selected or at completion of satisfactory power-up test.