TM 1-1510-224-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
PRIOR TO MAINTENANCE TEST FLIGHT (CONT)
NOTE
Before conducting the INS BIT ensure mode selector
is in ALIGN and align state is 8 or lower but before
mode selector is placed in NAV.
(c)
INS BIT - Perform as follows:
(1)
INS - Select on EHSI by depressing
INS/TCN on display controller.
(2)
INS - Select on single needle
bearing source selector switch on
display controller.
(3)
UTIL ON MFD - Depress.
(4)
INS BIT (R1) - Depress.
(5)
INS BIT (R2) - Depress.
(6)
NAV on flight director mode selector
- Select.
a
MFD - INS BATT, INS FAIL, and
WAYPOINT
ALERT
CWA
annunciators (3) illuminated.
b
EHSI - INS needle 30 degrees
right of libber line and course
deviation bar displaced right
followed
by
INS
needle
centering and course deviation
bar displaced left. Check WPT
alert annunciator illuminated.
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