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Removal and Replacement of Main Rotor Blade Tip Weight Retention Nuts on All AH-64 Helicopters		Up
TB-1-1520-238-20-77 Removal and Replacement of Main Rotor Blade Tip Weight Retention Nuts on All AH-64 Helicopters Manual		Next
Correction Procedures

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
with this message in accordance with paragraph 14c(2).
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until 24 June 1998 unless sooner rescinded or superseded.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.
b. For manpower/downtime and funding impacts, see paragraph 12.
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
1615-01-147-4873
Main Rotor Blade
7-311412000-3
1615-01-310-4978
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
1615-01-330-5098
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
5305-01-224-6693
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

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