L O C
A /P E N G A G E
L CR
C M DC M DC M D F /D O N
H O L D A P P
D IS E N G A G E O F F
Figure 3.9
Civil Aviation Flight University of China
4
AFDS Mode Control Panel
A fault in an engaged autopilot may also cause a disconnect.
A utopilot D isconnect Sw itch
Figure 3.10
PULL UP C A B IN
A LT AUTO P IL O T FMC
A /P D IS C
Armed and engaged selections are displayed on the ADI, with armed selections usually shown in white or amber, and engaged modes in green.
A /TA R M IA S /M A C H
In a modern system, it is normal for the AFDS to contain a separate FD computer that provides display instructions to the EFIS system, and the same instructions to the autopilot computer, which then converts the signals to appropriate commands for the servos.