Flight director/autopilot annunciators/alerter horns

TM 1-1510-223-MTF

PROCEDURE

TROUBLESHOOTING

REFERENCE

tude alerter annunciator on the pilot's

altimeter illuminates and the altitude

alerter horn sounds when the altimeter

reading is approximately 250 feet from

the value set on the altitude alert

controller.

(9) Pilot's altimeter - Reset to current

barometric altimeter setting or to field

elevation.

Flight director/autopilot annunciators/alerter

horns - Check as follows:

(1) SBY pushbutton switch indicator (flight director mode

selector) - Depress for at least 5 to 8 seconds and

verify the following indications:

(a) Flight director mode

selector

annunciators illuminate.

(b) Autopilot controller

annunciators

illuminate.

select controller.

(d) Altitude alert annunciator on pilot's

altimeter illuminates.

(e) FD

FAIL

(amber)

will

annunciated on the EADI.

(2) After the SBY pushbutton switch-

indicator has been held depressed for 5

to 8 seconds, verify that:

(a) AP TRIM annunciator illuminates.

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