TM 55-1520-240-T
11-3.3 AFCS OPERATIONAL CHECK (Continued)
11-3.3
TASK
RESULT
TABLE 11-3.2
TROUBLE SYMPTOM
Longitudinal Axis:
AFCS Pitch Stabilization Erratic or Oscillatory
AFCS Pitch Attitude/Airspeed Hold Weak
or Inoperative
AFCS Longitudinal Control Position Out of Trim
Lateral Axis:
AFCS Roll Stabilization Erratic/Oscillatory or
Roll Atitude Hold Weak or Inoperative
Heading Select Mode Response Weak or Inoperative
(Both Systems)
AFCS Heading Select Mode Response Weak
or Inoperative
Directional Axis:
YAW Stability Erratic/Oscillatory
AFCS Heading Hold Weak or Inoperative
AFCS Lateral Stick Only Turns Not Coordinated
Collective Axis:
Barometric Altitude Hold Inoperative or Response
Erratic (Radar Altitude Hold Okay)
Radar Altitude Hold Inoperative or Response
Erratic (Barometric Altitude Hold Okay)
Barometric and Radar Altitude Hold Inoperative or
Response Erratic
FOLLOW-ON MAINTENANCE:
TM 55-1520-240-23:
Hydraulic Power Off
Electrical Power Off
Battery Disconnected
Flight Controls Closet Acoustic
Blanket Installed.
Task Number
NO. 1 AFCS
11-3.49
11-3.50
11-3.52
11-3.53
11-3.54
11-3.55
11-3.57
11-3.59
11-3.60
11-3.61
11-3.62
11-3.63
NO. 2 AFCS
11-3.49
11-3.51
11-3.52
11-3.53
11-3.54
11-3.56
11-3.58
11-3.59
11-3.60
Electronic Compartment Acoustic
Blanket Installed
Pylon Left Work Platform
Closed.
Forward Left Work Platform
Closed.
90X54
END OF TASK
Change 2
11-59
