PROCEDURE TROUBLESHOOTING REFERENCE
Fly directly toward a TACAN 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 course
deviation indicator needle should be nearly centered and the
to / from indicator should read to. The red glideslope
warning flag should be visible but the NAV warning flag
should be concealed.
Rotate course card until direction to station is beneath
reciprocal course index. The course deviation indicator
needle should be centered and the to / from indicator should
Rotate the course card until the direction to the station is
directly below the course index again and the to / from
indicator reads to.
Fly a 90° right turn such that the flight path is at a 90° angle
to the direction to the station. The course deviation
indicator needle should deflect noticeably to the left after
one or two miles of flight (assuming the station is 25 to 50
miles from the aircraft).
TACAN range test: Achieve adequate usable reception at