*TB 1-1520-250-20-4
in wholesale depot storage shall be placed in condition code "J" and tagged with a suspended tag/label. Materiel, DD
form 1576/DD Form 1576-1. Do not remove original condition tags. Report compliance with this TB in accordance with
14.d.(1).
(2) Retail Stock. Report receipt of this TB in accordance with paragraph 14.c.(2). Upon receipt of this TB
commanders and others, maintaining retail stock at installation level and below, shall contact the supported aviation unit
to perform the inspection required by paragraph 8. and the correction procedures of paragraph 9. on discrepant
materiel. Disposition of discrepant materiel will be in accordance with paragraph 10. Report compliance with this TB in
accordance with paragraph 14.d.(2).
g.
Components/parts in work (Depot Level and Other). Items listed in paragraph 6. in work will not be issued
until compliance with this TB.
2.
Task/Inspection Suspense Date. Review aircraft records within 10 hours/14 days. Removal of spindle
assemblies with suspect retention rods shall be accomplished immediately upon inspection results, if the total flight hours
on spindle retention rod is 1100 hours or greater. Spindle assemblies that have a suspect retention rod installed that has
not reached the 1100 hour retirement life shall be replaced at a maximum of one calendar year from the date of this TB,
regardless to whether or not the retention rod reaches the reduced retirement life of 1100 hours. By no means shall the
1100 hour retirement life be overflown in this one year time frame.
3.
4.
Summary of the Problem.
a.
The spindle retention rod, P/N 70102-08102-102/103 manufactured by the Purdy corporation has recently
completed the required engineering testing. The results indicate that the endurance strength is not equivalent to that of a
original equipment manufactured component and shall have a reduced retirement life of 1100 hours. Therefore, all
subject retention rods manufactured by the Purdy corporation shall be removed from service immediately if the total
flight hours on spindle retention rod is 1100 hours or greater. Spindle assemblies that have a suspect retention rod
installed that has not reached the 1100 hour retirement life shall be replaced at a maximum of one calendar year from
the date of this TB regardless to whether or not the retention rod reaches the reduced retirement life of 1100 hours. By
no means shall the 1100 hour retirement life be overflown in this one year time frame.
b.
For manpower/downtime and funding impacts see paragraph 12.
c.
The purpose of this TB is to remove from service, all spindle assemblies listed in paragraph 6 below with the
Purdy corporation manufactured spindle retention tie rod installed, P/N 70102-08102-102/103
5.
End Items to be Inspected. All H-60 series helicopters.
6.
Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
Spindle Assembly
70102-08200-056
70102-08200-055
N/A
70102-08200-063
70102-08200-054
70102-08200-053
N/A
70102-08200-044
70102-08200-043
N/A
70102-08200-042
70102-08200-041
N/A
70070-10030-041
N/A
2
