TM 55-1510-220-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
F.
AVIONICS FLIGHT CHECKS (CONT)
e.
Course indicator switches (instrument panel) - VOR.
f.
Glideslope indicator (course deviation indicators) - Read glideslope indications.
g.
Fly an ILS approach monitoring localizer and glideslope indicators.
h.
Fly the approach monitoring localizer and glideslope indicators, and marker beacon indicator lights
and audio tone for proper function.
i.
In horizontal flight over the ground station cone of silence marker, at 10,000 feet above ground
level, a position marker beacon indication should be received for a distance of not less than one
mile.
j.
In horizontal flight over the ground station at any altitude, the duration in miles of marker indication,
when approaching a point directly over the ground station, shall not be more than 50 percent
greater than the duration in miles of marker beacon indication when leaving the point directly
over the ground station, and visa-versa.
*10.
VOR receiver - Check as follows:
K11-13, 28-30
4-30
