Control System Push Button Indicators
are located on panel F2 for the commander and panel F4 for the pilot.
The flight control system's push button light indicators transmit
flight crew moding requests to the digital autopilot in the flight
control software and reflect selection by illuminating the effective
The push button
light indicators are used to command and reflect the status of the
pitch control mode. The pitch and roll/yaw indicators transmit moding
requests to the digital autopilot and indicate the effective state
of the pitch, roll and yaw DAP channels by lighting.
that control is automatic and no crew inputs are required. CSS is
control stick steering; crew inputs are required but are smoothed
by the DAP (stability augmentation, turn coordination).
The spd brk/throt
(speed brake/throttle) push button light indicator has two separate
lights, auto and man (manual), to indicate that the DAP speed brake
channel is in the automatic or manual mode. The push button light
indicator transmits only the auto request.
The body flap
push button light indicator also has separate auto and man lights,
indicating the state of the body flap channel. Like the spd brk/throt
push button light indicator, the body flap indicator transmits only
the auto request.