TM 55-1510-221-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
again and the to/from indicator reads to.
i.
Fly a 90
right turn such that the flight path is at a90
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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