points. Verify that TACAN dis-
tance accuracy is within 2% of
11. Flight management system - Check as
12. Flight management system - Check as
follows: system using the GPS sensor
by positioning aircraft on or over a
known check point and comparing
indicated location with known loca-
(a) Flight management system - Set
up and operate in accordance
with TM 1-1510-225-10 using
the GPS sensor.
(b) Coordinates or identifier of
checkpoint - Insert into FMS.
(c) Position aircraft on a ground
check point if possible or fly over
(d) Record the distance from the
location provided by the FMS to
the location of the known check-
point. Maximum permissible
error is 0.124 nautical miles (750
13. Transponder set - 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.
(e) Fly aircraft within line of sight of
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