TM 1-1510-253-CL
AUTOPILOT TRIM FAIL ANNUNCIATION
Mistimed condition may occur in con-
junction with Pitch Trim failure. When
autopilot is disengaged in mistimed con-
dition, expect abrupt change in control
forces. Failure to comply could cause
damage to equipment.
Illumination of red TRIM annunciation TRIM on PFDs
indicates that autopilot pitch trim system has failed.
Autopilot will not automatically disengage, and may
not function properly.
ALT or VS or IAS
INDICATES AN ADC FAILURE
1. ADC Circuit Breaker -- CHECK
2. ADC Switch -- Select operative ADC
Autopilot will function in basic roll/pitch
modes (as indicated by yellow strike-
outs of selected mode) until autopilot is
coupled to operative ADC side.
ADC comparators will be inoperative.
Couple FGC to operating side ADC to
re-engage autopilot modes.
DUAL ADC FAILURE
1. ADC Circuit Breakers -- CHECK
Use Electronic Standby Instrument
System and land at nearest suitable
airport.
TCAS will be inoperative.
Transponder Mode C will be inopera-
tive.
AUTOPILOT and YAW DAMPER will
operate in ROLL and PTCH mode only.
E-46
