TM 55-1510-219CL
5. TO/FROM pointer - Check that pointer indicates TO.
6. HSI course deviation bar - Check for centered bar.
7. Marker beacon lights - Check that all three lamps are illuminated and
flickering at approximately a 30 Hz rate.
8. VOR frequency knob (NAV panel) - Select a LOC frequency.
9. HSI course deviation bar - Check that bar indicates a deflection of
approximately one dot right of center.
10. HSI glideslope pointer - Check that pointer indicates a deflection of
approximately one dot below center.
11. Marker beacon lights - Check that all three lamps are illuminated and
flickering at approximately a 30 Hz rate.
NAV 2
All NAV 2 self-test procedures are the same as those used for NAV 1, with the
exception of the marker beacon test. There is no marker beacon receiver in the
NAV 2 system.
TACAN
1. TEST pushbutton - Press and hold.
2. Range indicator - Check for an indication of 0.0 ± 0.1 nautical miles.
3. Pilot's COURSE SELECTOR switch - Select TACAN.
4. Pilot's RMI selector switch - Select TACAN.
5. RMI double needle - Check for an indication of 180
20.
P-9
