TB 1-1520-238-20-77
(2) Material located in installation/unit storage. Report receipt of this TB paragraph 14b(2). Upon
receipt of this message commanders and others maintaining retail stock shall contact the supported aviation
organization to perform the correction procedures of paragraph 9 on discrepant material. Report compliance
g. Components/parts in work. Assembly components listed in paragraph 6 will not be issued until
compliance with this message.
2. Task/lnspection Suspense Date. No later than the next Phased Inspection. This publication is effective
until 24 June 1998 unless sooner rescinded or superseded.
3. Reporting Compliance Suspense Date. No
later than 15
days after receipt of
this TB
per paragraph 14.a
of this TB.
4. Summary of the Problem.
a. After removing the main rotor blade tip cap, inspection revealed that one of the nuts securing the aft
weight support fitting was cracked.
c. The purpose of this TB is to replace the nuts that secure both the forward and aft main rotor blade tip
weight fittings and to reduce the torque on these nuts.
5. End Items to be inspected.
All Army AH-64 aircraft and all spare main rotor blades listed in
paragraph 6
below.
6. Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Main Rotor Blade
7-311412000
Main Rotor Blade
7-311412000-3
Main Rotor Blade
7-311412000-5
1615-01 -332-0702
Main Rotor Blade
7-311412000-A
1615-01 -331 -2483
Main Rotor Blade
7-311412000-3A
Main Rotor Blade
7-311412000-5A
1615-01 -415-6397
7. Parts to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Screw, Close Tolerance
HS4396-3T4
Screw, Close Tolerance
HS4396-3T5
5305-01 -219-8718
Stud, FWD
7-211412030-3
5307-01 -163-4675
Stud, AFT
7-211412030-7
5307-01 -167-1968
8. Inspection Procedures. NIA
2