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d. Autodrift null check | Up
TM-1-1520-238-MTF Maintenance Test Flight Manual Helicopter Attack
AH-64A Apache | Next
AFTER STARTING APU (CONT) |
TM 1-1520-238-MTF
2-31
PROCEDURE
TROUBLESHOOTING
REFERENCE
AFTER STARTING APU (CONT)
e. Turret travel check:
(1) Sensor select switch – As
desired. (FLIR tracks the
fastest).
(2) Verify proper response to
thumbforce commands and
presence of LIMITS message
in high action display when the
turret is slewed to the azimuth
and elevation limits.
CAUTION
Approach travel limits slowly to prevent
driving the turret into the stops.
(3) SLAVE switch – SLAVE.
f. TV sensor operational check:
(1) Sensor select – TV. Evaluate
image and symbology quality in
each field of view.
(2) IAT/IAT offset check – Slew
turret to a target of relatively
high contrast differential:
(a) IAT polarity switch – Select
appropriate polarity for
image lock on.
(b) IAT MAN switch – Engage.
Verify proper lockon of
selected image.
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