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MAINTENANCE MANDATORY RCS CSGLD-1860 (R1), ALL H-60 AIRCRAFT MAIN ROTOR SHAFT EXTENSION ASSEMBLY P/N 70351-08186-043 MANUFACTURED BY FENN MANUFACTURING COMPANY
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TB-1-1520-237-20-202 RCS CSGLD-1860 (R1) All H-60 Aircraft Main Motor Shaft Assembly P/N 70351-08186-043 (Cage Code 82001) and (Cage Code 15152) Manual
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Application. - TB-1-1520-237-20-2020003
TB 1-1520-237-20-202
e.
Maintenance Trainers. (Category A and B). Same as paragraph 1.a.
f.  Component/Parts in Stock Including War Reserves at all Levels (depot and Others). Upon
receipt of this TB, all items listed in paragraphs 6 and 7 in condition code D due to UH-60-97-ASAM-09
shall be re-identified to the appropriate condition code. The authority block must reference this TB (UH-
60-98-ASAM-01/ Main Rotor Shaft Extension Assy). Report compliance with this TB message IAW
Items listed in paragraphs 6 in work will not
g. Component/Parts in work (Depot Level And Others).
be issued until compliance with this Technical Bulletin.
2. Task/Inspection Suspense Date. Within next 10 flight hours/14days.
3.
Reporting Compliance Suspense Date. No later than 24 October 97 per paragraph 14.a of this TB.
4. Summary of Problem.
a. The Main Rotor Shaft Extensions manufactured by the Purdy Corporation (Cage Code 15152) and
Fenn Manufacturing Company (Cage Code 82001) was restricted to 2100 hours of service by Safety
Action Message UH-60-97-ASAM-09. Required testing has been completed and the parts are equivalent
to the original manufacturers components. The service life of the subject components is revised to the
original 14,000 hours.
b.
For manpower/downtime and funding impacts see paragraph 12.
c.  The purpose of this TB is to eliminate the restricted service life of the Fenn Manufacturing and
Purdy Corporation Main Rotor Shaft Extension Assemblies, P/N 70351-08186-043, implemented by UH-
60-97-ASAM-09.
5.
End Items to be inspected. All H-60 aircraft.
6.
Assembly Components to be inspected.
Nomenclature
NSN
Part No.
M/R Shaft Assy
70351-08186-043
7. Parts to be inspected. N/A.
8. Inspection Procedures. Inspect time change DA FORM 2408-16, DD FORM 1575-1. If form
shows 2100 hours for specified part due to the previous ASAM, go to paragraph 9 correction procedure.
If time change record does not show 2100 hour life for specified part then inspection is complete. If DD
FORM 1575 or 1575-1 is attached to wholesale or retail stock item, go to paragraph 9 correction
procedure.
9. Correction Procedures.  Annotate the aircraft time change DA FORM 2408-16 to reflect the
original service life of 14,000 hours for the specified M/R Shaft Extension Assemblies.
10. Supply/Parts and Disposition.
a. Parts Required. N/A
b. Requisitioning Instructions. N/A.
2

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