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Page Title:
Localizer/glideslope/marker beacon |
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 TM 1-1510-223-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
G. AVIONICS FLIGHT CHECKS (CONT)
(d)
Certified check points on an
airport surface.
Maximum
permissible error is +4
.
(e)
Comparison of indications of
dual aircraft VOR systems.
The maximum permissible
variation between the two
indicated bearings is 4
.
b.
Localizer/glideslope/marker
beacon
-
Check as follows:
(1) Marker beacon volume control
(pedestal extension) - Rotate full
clockwise.
(2) NAV A control (pilot's audio control
panel) - Push on and turn
clockwise to adjust volume. Verify
that clear audio signals are
available.
(3) Tuning knobs (VOR control panel) -
Select localizer frequency.
(4) VOR/localizer pushbutton selector
switch
(display
controller)
-
Depress to select ILS 1 or ILS2
navigation source annunciator on
respective HSI.
(5) Glideslope indicator (EADI and
EHSI)
-
Read
glideslope
indications.
(6) Fly an ILS approach monitoring
localizer and glideslope indications
and marker beacon indicator lights
and audio tone for proper function.
4-18
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