TB 1-1520-237-20-179
in wholesale depot storage shall be placed in condition code J and tagged with a suspended tag/label. Materi-
al, 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
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. Tisk/lnspection Suspense Date. Review aircraft records within 10 hours/14days. 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.
this TB.
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
All H-60 series helicopters.
5.
End Items to be Inspected.
6.
Assembly Components to be Inspected.
NATIONAL STOCK NUMBER
PART NUMBER
NOMENCLATURE
70102-08200-056
Spindle Assembly
70102-08200-055
N/A
70102-08200-063
70102-08200-054
N/A
70102-08200-053
70102-08200-044
N/A
70102-08200-043
70102-08200-042
N/A
70102-08200-041
N/A
70070-10030-041
2
