Slaved compass systems

TM 1-1510-223-MTF

PROCEDURE

TROUBLESHOOTING

REFERENCE

(1) Fly aircraft to test altitude.

(2) ALT switch-indicator (flight director mode

selector) - Press on.

(3) Verify that the aircraft maintains the

altitude being flown at the time the ALT

hold switch was pressed.

Check autopilot indicated

airspeed

hold

function as follows:

(1) Fly aircraft to test airspeed.

(2) IAS switch-indicator (flight director mode

selector) - Press on.

(3) Aircraft should maintain airspeed that was

being flown at the time IAS hold switch

was pressed.

Check roll command function of autopilot as

follows:

(1) TURN control knob (autopilot controller) -

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 2and within 3of each other.

* 3. Inertial Navigation System Flight Test - Perform as

follows:

Demonstrate satisfactory performance by flying over

three known checkpoints, and comparing the inertial

present position readouts with the coordinates of the

checkpoints. Establish a

4-9