TM 1-1520-238-MTF
2-71
PROCEDURE
TROUBLESHOOTING
REFERENCE
HOVER CHECKS (CONT)
e. TRIM release switch – Down
momentarily, then ON. Note
ATTD/HOVER HOLD switch
disengages.
6. Torque repeatability check – As
required. Refer to Chapter 4, paragraph
O.
*7. Visionic system – Check as follows:
a. Maneuver the helicopter as
required to be in azimuth alignment
with a target at least 500 meters
away.
b. TADS – Slew to target. Select N
FOV, TV or FLIR. Observe display
during remainder of check but do
not attempt to recenter target.
NOTE
The TADS inertial stabilization system
should compensate for azimuth changes of
aircraft displacement but will not compen-
sate for lateral aircraft displacement.
c. Perform 90 left and right pedal
turns.
d. Note target remains within narrow
field of view during entire check.
