TM 55-1510-222-MTF
P R O C E D U R E
T R O U B L E S H O O T I N G
R E F E R E N C E
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%.
*m. TACAN distance measuring
equipment
- Check against
known distances (on the
ground
if possible) using
known checkpoints. TACAN
should indicate known dis-
tances to within ±0.5 miles or
±3% of range. whichever is
greater.
*12.
Transponder set - Check as fol-
K40
lows:
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.
e. Fly aircraft within line of
sight of interrogating stations.
f. Contact the facility by radio
and request that the aircraft
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