PRIOR TO MAINTENANCE TEST FLIGHT (CONT)

TM-1-1510-224-MTF Maintenance Test Flight Manual Army RC-12P Aircraft and Army RC-12Q Aircraft
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TM 1-1510-224-MTF PROCEDURE TROUBLESHOOTING REFERENCE PRIOR TO MAINTENANCE TEST FLIGHT (CONT) (1) Tuning knobs (NAV control unit) - Select a localizer frequency. (2) TEST switch (NAV control unit) - Depress. (3) The NAV and GS flags on EHSI - Will come into view. After 3 seconds, the flags will go out of view, the EHSI course deviation bar will deflect right 2/3 full scale, and the glide slope pointer will deflect down 2/3 full scale. (4) VIR-32 - Will return to normal after 15 seconds. *38. ADF receiver - test as follows: (a) Power and mode switch - On. (b) Tuning knobs - Tune a nearby NDB, compass locater, or broadcast station. (c) EFIS display controller - Select ADF on the single needle pointer bearing source selector switch. (d) TEST switch - Depress. Bearing pointer will rotate 90 degrees from the previous indication. Release TEST switch and verify the bearing pointer returns to the previous indication. *39. TACAN/DME indicator system: (a) TACAN/DME - Will conduct a self test for 3 seconds after power-up. After 3 seconds, check 2-26

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