TM 1-1520-240-MTF
4-53
5. ILS (if available).
a. At a distance of at least 9 nautical miles,
tune to the localizer frequency. Start on ILS
approach.
b. Check that NAV and GS warning flags are
concealed.
c. Steer right and left. Check that the localizer
pointer moves left and right, respectively.
d. Climb and descend. Check that the glide
slope pointer moves up and down,
respectively.
e. Check marker beacon lights and audio
during approach. Check high and low
sensitivity.
f. With pointers centered, continue approach
to runway to ascertain that proper landing
can 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 magnetic
bearing to station.
e. No. 2 pointer fluctuation $5_.
f. Station passage.
7. Marker beacon.
a. Push to test any MKR BCN light. (One light
tests all three).
b. Check audio high and low sensitivity over
appropriate markers.
