AVIONICS FLIGHT CHECKS (CONT)
Marker beacon sensitivity switch
(pedestal extension) - HI.
Fly toward marker beacon station.
When marker beacon indicator light
illuminates and audio tone sounds,
indicator light and audio tone cease.
Verify that marker beacon indicator
light again illuminates and audio
illuminates and audio tone sounds.
TACAN - Check as follows:
NAV B control (audio control panel) - Depress
on and rotate clockwise to set volume.
Frequency selectors (TACAN control panel) -
Set test frequency.
Volume control (TACAN control panel) - As
INS/TACAN pushbutton selector switch
(display controller) - Depress to select
TCN navigation source annunciator on
Fly directly toward a TACAN station of known
direction and near enough to provide a reliable