PROCEDURE TROUBLESHOOTING REFERENCE
NAV A control (audio control panel) - Depress on and rotate
clockwise to set volume.
Off/volume control (VOR control panel) - Rotate clock-wise
to turn set on, and set volume as required.
Frequency selectors - Set test frequency.
Course indicator switches (instrument panel) - VOR.
Fly directly toward a VOR station of known direction and
near enough to provide a reliable signal.
Rotate course card on course deviation indicators until
direction 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
Rotate course card until direction to station is beneath
reciprocal course index. The VOR/localizer crosspointer
should be centered and the to / from indicator should read
Rotate the course card until the direction to the station is
directly below the course index