TM 55-1510-219-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
BEFORE TAXIING (CONT)
NOTE
The AP TRIM FAIL annunciator will extinguish by pressing the
AP/YD disconnect button on the control wheel to the second
detent.
m. Repeat steps (i) thru (1) above using
opposite commands.
n. Autopilot - Engage.
o. HSI heading marker - Move to command
a bank on flight director indicator.
p. GO-AROUND switch - Press and verify
that GA annunciator light illuminates,
autopilot disengages, and that flight
director indicator commands a wings
level 7° nose-up attitude.
q. TEST switch (pilot's flight director
indicator) - Press and verify that attitude
display indicates an additional 10° pitch
up and 20° right roll, and GYRO flag is
visible.
*5. Autopilot trim fail system - Check as follows:
a. Autopilot - Engage. Command DN on
AP pitch wheel and hold TRIM TEST
switch when elevator trim wheel starts to
rotate.
b. Verify that autopilot disengages and AP
TRIM FAIL and MAS-
2-24
