TM 1-1520-240-MTF4-535. ILS (if available).a. At a distance of at least 9 nautical miles,tune to the localizer frequency. Start on ILSapproach.b. Check that NAV and GS warning flags areconcealed.c. Steer right and left. Check that the localizerpointer moves left and right, respectively.d. Climb and descend. Check that the glideslope pointer moves up and down,respectively.e. Check marker beacon lights and audioduring approach. Check high and lowsensitivity.f. With pointers centered, continue approachto runway to ascertain that proper landingcan be made.6. ADF.a. Tuning, reception and volume.b. Check ADF, ANT and LOOP operation.c. ADF on HSI MODE SELECT panel —Engaged and lit.d. No. 2 pointer on HSI within $3_of magneticbearing to station.e. No. 2 pointer fluctuation $5_.f. Station passage.7. Marker beacon.a. Push to test any MKR BCN light. (One lighttests all three).b. Check audio high and low sensitivity overappropriate markers.
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