TM 55-1510-221-MTFPROCEDURE TROUBLESHOOTINGREFERENCEG. AVIONICS FLIGHT CHECKS (CONT)again and the to/from indicator reads to.i.Fly a 90right turn such that the flight path is at a90angle to the direction to the station. The VOR/localizerneedle should deflect noticeably to the left after one or two miles of flight (assuming the station is 25 to 50 miles from the aircraft).j.VOR range test: Achieve adequate usable reception at45 miles at 1,250 feet above station antenna altitude.k.VOR ground-track accuracy test Fly aircraft over a predetermined ground check point. The maximum error shall be ± 3%.*11. TACAN - Check as followsa.NAV B control (audio control panel) - Depress on and rotate clockwise to set volumeb.Power switch (TACAN control panel) - ON.c.Frequency selectors (TACAN control panel) - Set test frequency.d.Volume control (TACAN control panel) - As requirede.Course indicator switches (instrument panel) - TACAN4-32
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