TM 55-1510-222-MTF
P R O C E D U R E
T R O U B L E S H O O T I N G
R E F E R E N C E
c.
d.
e.
f.
g.
h.
i.
j.
ume.
Clear audio signals
should be available.
Marker beacon sensitivity
switch (pedestal extension) -
As required.
Frequency
selectors (VOR
control panel) - Select localiz-
er frequency.
Course indicator switches (in-
strument panel) - VOR.
Glideslope indicator (course
deviation indicators) - Read
glideslope indications.
Fly an ILS approach monitor-
ing localizer and glideslope in-
dicators.
Fly the approach monitoring
localizer and glideslope indi-
cators, and marker beacon in-
dicator lights and audio tone
for proper function.
In horizontal flight over the
ground station cone of silence
marker, at 10,000 feet above
ground level, a position mark-
er beacon indication should
be received for a distance of
not less than one mile.
In horizontal flight over the
ground station at any altitude,
the duration in miles of mark-
er indication, when approach-
ing a point directly over the
ground station, shall not be
more than 50 percent greater
than the duration in miles of
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