TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
i.
Check roll command function of autopilot as follows:
(1)
Turn control knob (autopilot pitch-
turn control
panel) - Turn
to L and R and verify that autopilot
turns aircraft left or right respectively.
*2.
Slaved compass systems - Check that systems
agree with known magnetic headings within 2
and within 3
of each other
*3.
Inertial Navigation System Flight Test - Perform as
follows:
Satisfactory performance shall be demonstrated by flying over three
checkpoints whose latitude and longitude are known, and comparing
them with the inertial present position readouts. The aircraft
shall
establish a low altitude, compatible with aircraft safety and applicable
laws and codes of flight, which will allow accurate sighting of ground
landmarks. An altitude of 1000 feet over waypoints and 10,000 feet or
more when between waypoints is recommended whenever possible.
a.
Inertial navigation system - Set up, align, and operate in
accordance with TM 55-1510-221-10.
b.
TACAN update - Check as follows.
(1) Key 4 - Depress
(2) INSERT/ADVANCE key - Depress Key will dim
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