ACR Electronics 3990, Product Support Manual

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Y1-03-0146 Rev. D
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(4) Replace batteries if device is used on a mission or annually.
10. Alignment
No alignment procedures or special inspection requirements must be performed on the
MS-2000(M).
11. Periodic Inspection Requirements
Normally the MS-2000(M) and associated batteries will be inspected concurrently with
other equipment installed in aircraft/ejection seat survival kits, aircrew survival vest or
other special requirements. Such inspection intervals will be as specified by respective
MAJCOM/agency life support directives. Periodic inspections will include both flash
rate and preventative maintenance checks.
See paragraphs 5 and 9 for details. Record inspection dates per MAJCOM/agency
procedures and directives.
12. Replacement Parts List
a. Flashguard shield assembly A3-06-1920
b. Battery door assembly A3-06-1921-3
c. IR Filter A1-18-1322
Item a. comes complete with blue filter, IR filter and labels.
Item b. comes complete with retention cable, battery cover screw, door and o-ring.
13. Parts Replacement Procedure
To replace flashguard, remove the old flashguard by grasping the flashguard with one
hand and the light body and lanyard in the other. Pull them sharply away from each
other. Then slide the new flashguard in place until it clicks into the locked position.
To replace the battery door, just unscrew the wire cable from the insert in the battery
compartment. To install new battery door, screw the cable end through the insert in the
battery compartment. The cable is held in place after the threaded cable-end goes all the
way through the insert.
To replace the IR filter, remove the old filter by locking it in the IR position, then slide a
7 level screwdriver between the flashguard case and the IR filter attachment leg twist the
screwdriver or pry upward and the leg will pop off of the retainer. Put the replacement
filter into place then press with thumb to seat legs over retainers.