PROCEDURE TROUBLESHOOTING REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
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 VOR/localizer needle
should deflect noticeably to the left after one or two miles of
flight (assuming the station is 25 to 50 miles from the
VOR range test: Achieve adequate usable reception at 45
miles at 1,250 feet above station antenna altitude.
VOR ground-track accuracy test: Fly aircraft over a
predetermined ground check point. The maximum error
shall be 3%.
TACAN - Check as follows:
NAV B control (audio control panel) - Depress on and rotate
clockwise to set volume.
Power switch (TACAN control panel) - ON.
Frequency selectors (TACAN control panel) - Set test
Volume control (TACAN control panel) - As required.
Course indicator switches (instrument panel) - TACAN.