TM 1-1510-218-CL
P-6
2. Verify that autopilot disengages and AP TRIM
FAIL and MASTER WARNING lights illuminate
within 10 seconds.
AUTOMATIC FLIGHT CONTROL SYSTEM D2
1. Altitude alert.
NOTE
Pause a few seconds after each step to allow
time for the proper indications.
a. Set alert controller more than 1000 feet above
altitude indicated on pilot's altimeter. The
pilot's
altimeter
alert
light
should
be
extinguished.
b. Decrease the alert controller to within 1000
feet of the pilot's altimeter setting. The alert
light should illuminate.
c. Decrease the controller to less than 250 feet
above the pilot's altimeter setting. The alert
light should extinguish.
d. Increase the controller to 300 ± 50 feet above
the pilot's altimeter indication and check that
the alert light illuminates.
e. Set the desired altitude.
2. Autopilot.
a. Autopilot controller UP TRIM, DN TRIM
annunciators – Check not illuminated.
CAUTION
A steady illumination of UP TRIM or DN TRIM
annunciator indicates that the automatic
synchronization is not functioning and the
autopilot should not be engaged.
