TM 55-1510-219-MTF
PROCEDURE TROUBLESHOOTING REFERENCE
(2)
INSERT/ADVANCE
key
-
Depress. Key will dim.
(3)
Right display Check. Display
should read 1-XX4, indicating
that the INS is in the TACAN
update mode.
(4)
Data selector (while in flight) L/L
WYPT or UTM WYPT.
(5)
Keys
7
and
9
Depress
simultaneously. The number of
the TACAN station being used
for navigation shall flash on and
off.
(6)
FROM-TO
display
Monitor
station
selection.
Only
the
number of stations eligible for
mixing will be displayed. A " 0 "
indicates that none of the 9
stations are eligible for update.
NOTE
Mixing will not take place if TACAN
station data is loaded in error or if the
ratio of the distance from the station to
the aircraft altitude is less than 2 to 1.
(7)
INS
TACAN
range
display
Monitor.
The
display
shall
indicate the range to the station
used for update. If no station is
being used for update, the
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