TB 1-1520-240-20-844
(1) Materiel Located in All Wholesale Depots Including All Satellite Wholesale Depots and War Reserve Depots -
Report receipt of this TB in accordance with paragraph 14c(1). Upon receipt of this TB depot commanders and others
maintaining wholesale stock shall ensure that serviceable materiel (condition codes "A", "B", and 'C" is placed in
condition code "J" and tagged with a suspended tag/label - materiel DD Form 1576/1576-1. Annotate the remarks block
with TB 1-1520-240-20-84, Screening of Pivot Bolts Not Complied With. Do not remove existing materiel condition tags.
Report compliance with this TB in accordance with paragraph 14d(1).
(2) Materiel Located in Installation/Unit Storage - Report receipt of this TB in accordance with paragraph 14c(2).
Upon receipt of this TB, commanders and others maintaining retail stock shall contact the supported aviation
organization to perform the inspection required by paragraph 8 and to perform the correction procedures of paragraph 9
on discrepant materiel. Report compliance with this TB in accordance with paragraph 14d(2).
2.
Task/Inspection Suspense Date - Within 10 hours/ 14 days.
3.
4.
Summary of the Problem.
a. The rotary wing head controls bolt assembly, P/N 11 4R3650-3, a flight safety part, is being manufactured by a
vendor, Accurate Tool Co., that is not listed as an approved source in the U.S. Aviation Troop Command spares
Technical Data Package (TDP). Bolt Assemblies, P/N 114R3650-3, that were manufactured by Accurate have been
found in the field. Since they are not listed in TDP, none of their bolts have gone through a rigid First Article Testing as
those manufacturers listed in the TDP.
b. For manpower/downtime and funding impacts - See paragraph 12.
c. The purpose of this TB is to inspect and replace the rotary wing head controls bolts assemblies, P/N 114R3650-3,
that were manufactured by Accurate Tool Co. Inspect per paragraph 8.
5.
End Items to be Inspected - All CH-47D, MH-47D, and MH-47E aircraft.
6.
Assembly Components to be Inspected -
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
FWD CONTROLS INSTL
145R3550
None assigned
7. Parts to be Inspected -
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
BOLT ASSY - ROTARY WING
114R3650-3
HEAD CONTROL
8. Inspection Procedures - Inspect the forward control installation for manufacturer of the rotary wing head control bolt
assembly, P/N 114R3650-3. If manufacturer is not Accurate Tool Co., then no further action is required. Accurate has
vibro-etched their company name on top of the bolt head. If the manufacturer is Accurate Tool proceed to paragraph 9.
9. Correction Procedures - If the bolt assembly is manufactured by Accurate Tool Co. replace it with another vendor
assembly.
10. Supply/Parts and Disposition -
a. Parts Required - Items cited in paragraphs 6 and 7 may be required to replace defective items.
b. Requisitioning Instructions - Requisition replacement parts through normal supply channels using normal supply
procedures. All requisitions shall use project code "XCC" per this TB.
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