TM 1-1510-224-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
PRIOR TO MAINTENANCE TEST FLIGHT (CONT)
and be replaced by TEST.
(b)
EHSI - DTRK, NM, GSPD, and
HDG displays - Replaced with
dashes.
(c)
AP disconnect horn sounds after 5
to 7 seconds.
NOTE
Preflight test of composite mode will cause same
results as above test, except digital heading readout
will be replaced with a red FAIL indication, and
expanded localizer scale and pointer will be
removed.
A localizer frequency must be tuned on both NAV
receivers to annunciate ILS comparator monitor.
EFIS test is inhibited during glideslope capture.
33.
Automatic flight control system - Check
as follows:
(a)
Altitude alerter - Check as follows:
NOTE
Pause for a few seconds between each step to allow
time for proper indications.
(1)
Altitude preselector - Set to
more than 1000 feet above
altitude
set
on
pilot’s
altimeter. Pilot’s altimeter
altitude alert annunciator light
should be extinguished.
(2)
Pilot’s altimeter barometric set
knob - Slowly increase
2-12
