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 TM 55-1510-218-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
i. VOR range test: Achieve ade-
quate usable reception at 45
miles at 1,250 feet above sta-
tion antenna altitude.
j. VOR ground-track accuracy
test: Fly aircraft over a prede-
termined ground check point.
The maximum error shall be
3%.
*k. Glideslope/marker beacon
function - Check as follows:
(1) Marker beacon off/
volume control (pilot's
audio control panel) - On,
rotate full clockwise.
(2) Marker beacon sensitivity
switch (pilot's audio con-
trol panel) - As required.
(3) Frequency selectors (VOR
control panel) - select lo-
calizer frequency.
(4) Course indicator switches
(instrument panel) - VOR.
(5) Glideslope indicator
(course deviation indica-
tors) - Read glideslope in-
dications.
(6) VOR receiver switch (au-
dio control panel) - On
(up).
(7) Volume control - Adjust.
Clear audio signals should
be available.
4-31
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