Figure 3-7. Electronic Standby Instrument System display (ESIS)
3-20. DIGITAL FLIGHT CONTROL SYSTEM (DFZ-450).
The digital light control system consists of the following components:
Flight Control Computer (FZ-450).
Stability Augmentation Computer (SZ-400).
Autopilot Controller (PC-400).
Flight Director Mode Selector (MS-207).
Rudder Servo (SM-205).
Elevator and Aileron Servos (SM-200).
Elevator Trim Tab Servo.
a. Flight Control Computer (FZ-450). The light control computer provides fail-passive operation of light di-
rector, autopilot, and pitch trim. Fail-passive operation is achieved through the use of comparator monitor Servo
command outputs from a computed servo model in all three axes are compared to actual commands. If the differ-
ence between commands exceeds a certain threshold value, the light control computer is disconnected from the
servos. Normal light control computer functions are computed based on the vertical and directional gyros selected
with the respective PFD display controllers.