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f. PITOT-AD SNSR anti-ice system | 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
2-27
PROCEDURE
TROUBLESHOOTING
REFERENCE
AFTER STARTING APU (CONT)
*g. CANOPY DEFOG switch – ON.
Verify warm air coming from
window diffusers. Then set as
desired.
*21. IHADSS – Boresight as follows:
a. PILOT
WARNING
Offset boresight is not authorized.
(1) SIGHT SEL switch – STBY or
NVS.
(2) VID SEL switch – GRAY SC.
Adjust grayscale to optimize.
(3) IHADSS VID BRT and
CONTRAST controls – Check
through full range. Then set as
desired.
(4) VID SEL switch – PLT.
(5) IHADSS VID SYM BRT control
– Adjust.
(6) IHADSS BRSIT switch – ON.
(7) INTR LT INST control – On.
Check reticle brightness
corresponds to switch position
through full range. Then set as
required.
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