TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
F.
AVIONICS FLIGHT CH ECKS (CONT)
dex again and the to/from indicator reads to.
i.
Fly a 90° right turn such that the flight path is at a 90!DE angle to the direction to the station. The
VOR/localizer needle should deflect noticeably to the left after one or two miles of flight (assuming
the station is 25 to 50 miles from the aircraft).
j. VOR range test: Achieve adequate usable reception at 45 miles at 1,250 feet above station antenna altitude.
k.
VOR ground-track accuracy test: Fly aircraft over a predetermined ground check point. The
maximum error shall be +3%.
* 11.
TACAN - Check as follows:
a.
NAV B control (audio control panel) - Depress on and rotate clockwise to set volume.
b.
Power switch (TACAN control panel) - ON.
c.
Frequency selectors (TACAN control panel) - Set test frequency.
d.
Volume control (TACAN control panel) - As required.
e.
Course indicator switches (instrument panel) - TACAN.
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