AVIONICS FLIGHT CHECKS (CONT) - TM-55-1510-218-MTF0156

TM 55-1510-218-MTF

PROCEDURE

TROUBLESHOOTING

REFERENCE

AVIONICS FLIGHT CHECKS (CONT)

j. Fly a 90 right turn such that

the flight path is at a 90 angle

to the direction to the station.

The course deviation indica-

tor needle should deflect no-

ticeably to the left after one or

two miles of flight (assuming

the station is 25 to 50 miles

from the aircraft).

k. TACAN range test: Achieve

adequate usable reception at

45 miles at 1,250 feet above

station antenna altitude.

l. TACAN ground-track accura-

cy test: Fly aircraft over a pre-

determined ground check

point. The maximum error

shall be 3%.

TACAN distance measuring K11-13,27-

*15.

equipment.

Check against known distances (on the ground if pos-

sible) using known checkpoints). DME should indi-

cate known distances to within +0.5 miles or 5% of

range. whichever is greater.

K40

*16. Transponder set (AN/APX-100).

Check as follows:

a. Master control - STBY (allow

2 minute warm up).

b. Master control - NORM.

c. Mode switches - Set test

mode.

d. Code selectors - Set test code.

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