TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
f.
Check autopilot VOR/ILS operation as follows:
(1) VOR receiver - Set.
(2) NAV switch (autopilot mode selector panel) - ON.
(3) When the aircraft is with- in 10 degrees of the selected radial it should begin a gradual
interception of the radial or glideslope signal.
g.
Check autopilot altitude hold function as follows:
(1) Fly aircraft to test altitude.
(2) Altitude hold switch - indicator (autopilot mode selector panel) - Press on.
(3) Aircraft should maintain the altitude being flown at the time the ALT hold switch was pressed.
h.
Check autopilot indicated airspeed hold function as follows:
(1) Fly aircraft to test airspeed.
(2) Airspeed hold switch- indicator (autopilot mode selector panel) - Press on.
(3) Aircraft should maintain airspeed that was being flown at the time IAS hold switch was pressed.
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