Flight director Check as follows:
SBY pushbutton switch-indicator (flight director
mode selector Depress for at least 5 to 8 seconds
and verify the following indications:
Flight director mode selector - Annunciators
Autopilot controller - Annunciators illuminate.
Altitude select controller - All 8's illuminate.
Pilot's altimeter altitude alerter annunciator -
EADI - FD FAIL (amber) will be annunciated.
After SBY pushbutton switch-indicator has been
held depressed for 5 to 8 seconds verify that:
AP TRIM annunciator - Illuminates.
Autopilot disconnect horn - Sounds.
SBY pushbutton switch-indicator - Release.
FD and ATT annunciations on the EADI - Check
Autopilot - Check as follows:
Autopilot trim annunciators - Check extinguished.
TURN knob - Center.
ELEV TRIM switch - Check on.
The control wheel must be held at mid-travel
due to ballast in the elevator. The autopilot
will disconnect during pitch wheel check due
to the heavy nose down force if the control
wheel is not off the forward stop.
Control wheel - Move to mid-travel.
AP ENGAGE switch-indicator (autopilot controller)
- Depress to engage autopilot and yaw damper.
Check that AP ENGAGE and YD ENGAGE switch
indicators on autopilot controller and remote
annunciators on instrument panel are illuminated.
Autopilot overpower check - Check as follows:
Rudder pedals - Overpower slowly.