TB 1-1520-237-20-190
2. Task/Inspection Suspense Date. Within 10 hours/14 days.
4. Summary of the Problem.
a. The Main Rotor Shaft Extensions manufactured by the Purdy Corporation. (Cage Code 15152) and by Fenn
Manufacturing company (Cage Code 82001) are undergoing testing. Until testing has been completed an interim finite
life of 2100 hours has been assigned. The Main Rotor Shaft Extension must be removed from the aircraft upon reaching
2100 hours of time in service.
b. For manpower/downtime and funding impacts see paragraph 12.
c. The purpose of this TB is to remove all 70351-08186-043 (Cage Code 15152) and (Cage Code 82001)
assemblies that have reached or exceeded 2100 hours IAW para 9.
5. End Item to be Inspected. All H-60 series aircraft.
6. Assembly Components to be Inspected.
NOMENCLATURE
PART NUMBER
NATIONAL STOCK NUMBER
M/R SHAFT EXTENSION ASSEMBLY
70351-08186-043
7. Parts to be Inspected. N/A.
8. Inspection Procedures. Verify visually that the Main Rotor Shaft Extension Assembly P/N 70351-08186-043 has
either manufacturers cage code numbers 15152 or 82001. For cage code 15152, there are three separate serial number
ranges. The serial number ranges are as Follows: 32710-4 through 32710-17,0926-20 through 0926-38 and 0343-1481
through 0343-1505. For cage code 82001 the serial number range is 28600-450 through 28600-568.
NOTE
Suspect serial numbers do not have a letter prefix.
If either specified shaft
extension Is not Installed, the Inspection Is complete.
9. Correction Procedures. i either specified Main Rotor Shaft Extension Assembly is found, annotate the aircraft time
change DA Form 2408-16 to reflect the new finite life of 2100 hours. Remove all Main Rotor Shaft Extensions, P/N
70351-08186-043, manufactured by the Purdy Corporation, cage code 15152, or Fenn manufacturing cage code 82001,
that have reached 2100 hours of service life.
10. Supply/Parts and Disposition.
a. Parts Required. Items cited in para 6 may be required to replaced defective items.
b. Requisitioning Instructions. Requisition replacement parts through normal supply channels using normal supply
procedures. All requisitions shall use project code "XC" per this TB.
NOTE
Project code "XC4" Is required to track and establish a data base of stock fund
expenditures Incurred by the field as a result of ASAM/SOF actions.
c. Bulk and consumable materials. N/A.
d. Disposition. Items identified and removed for having reached the 2100 hour interim lift will be placed in
condition code D and tagged with DD Form 1575 or DD Form 1575-1 (color brown) and held by the owning unit pending
the results of the engineering testing.
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