TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
annunciator illuminates) and that flight controls are free.
j.
Autopilot - Engage.
k.
Autopilot pitch-turn control (pedestal extension) - Command 5° trim UP and verify that manual trim
wheel moves nose up and AP trim light indicates UP trim.
l.
Pitch trim switch (control wheels) - Command nose down and verify that autopilot disengages and AP
TRIM FAIL and MASTER WARNING annunciator lights illuminate.
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.
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