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 TM 55-1510-218-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
d. Fly directly toward a VOR
station of known direction
and near enough to provide a
reliable signal.
e. Rotate course card on course
deviation indicators until di-
rection to station is beneath
course index. The VOR/
localizer needle should be
nearly centered and the to/
from indicator should read to.
The red glideslope warning
flag should be visible but the
VOR/localizer warning flag
should be concealed.
f. Rotate course card until di-
rection to station is beneath
reciprocal course index. The
VOR/localizer crosspointer
should be centered and the to/
from indicator should read
from.
g. Rotate the course card until
the direction to the station is
directly below the course in-
dex again and the to/from in-
dicator reads to.
h. Fly a 90 right turn such that
the flight path is at a 90 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 air-
craft).
4-30
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