Flight director/autopilot preflight test

TM 1-1510-223-MTF

PROCEDURE

TROUBLESHOOTING

REFERENCE

NOTE

A localizer frequency must be tuned on both NAV

receivers to annunciate ILS.

EADI - TEST appears in left center of

display to indicate that flight director mode

selector lamp test is good. FD FAIL will

appear momentarily and be replaced by

TEST in the left center of the EADI display

to indicate a problem in the EFIS

components or interconnection of the flight

director computer.

NOTE

Preflight test of the composite mode will cause the

same results as the above test, except the digital

heading readout will be replaced with a red FAIL

indication, and the expanded localizer scale and

pointer will be removed.

Test is inhibited during glideslope capture.

*34.

Flight director/autopilot preflight test.

BATTERY switch (overhead control panel) -

ON.

Aircraft # I and # 2 INVERTER switches -

ON.

AVIONICS MASTER POWER switch

(overhead control panel) - ON or EXT PWR

as required.

# 1 and # 2 EFIS POWER switches

(overhead control panel) - ON.

AUTO PLT POWER

switch

(overhead

control panel) - ON.

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