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  TB 1--1520--238--20--123
a. Searchlights on the AH--64D aircraft have been failing because of increased vibration brought on
by a design relocation during production. This harsh environment causes some internal/external fasteners
to loosen.
b. For manpower/downtime and funding impacts, see paragraph 12.
c. The purpose of this TB is to ensure that all AH--64D aircraft searchlights are inspected for this vibra-
tion problem and that locking compound is applied to fasteners as presented in paragraph 9.
5.
End Items to be inspected. All Army AH--64 aircraft.
6.
Assemblies to be Inspected.
Nomenclature
Part Number
National Stock Number
Assembly, Searchlight
7--211B12031
6620-01-160-3527
Motor Assy
46-0956-3
6105-01-038-9984
Rotating Motor (B1) 25140
3A1536
6105-00-635-5879
Base Plate Assy
46--0851--1
6220-01-022-1780
Parts to be Inspected.
Nomenclature
Part Number
National Stock Number Quantity
Screw, machine
MS51958--62
5305-00-889-2997
14
AN960PD8L
2
5310-00-184-9002
Washer, flat
AN960JD10L
5310-01-105-7241
16
Cover, terminal
A6881
5940-00-672-1607
1
Screw, machine
MS35206--230
5305-00-889-3000
1
MS35206-232
5305-00-984-4992
2
Block, terminal
A-6906--1
5940-00-983-6049
1
Screw, machine
MS5206--226
5305-00-984-4983
1
Washer, lock
MS35338--41
5310-00-045-4007
5
Plate, mounting
46--0851--1
6620-01-022-1780
1
Screw, machine
MS24693S28
5305-00-837-3343
4
Washer
MS35338--41
4
Nut, hex
NAS671--6
4
5310-00-631-1294
Gearbox assy
46--0965--5
1
Cover,
B-6908--1
6620-00-930-8338
1
Plate, identification
46--0880--1
1
46--1113--1
1
Screw
MS3520-209
5305-00-959-1713
2
2
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