TB 1-1520-240-20-75
4. Purpose. The purpose of this TB is to direct the field and the supply depots to locate Stratopower hy-
draulic pumps and report to the Logistical Point of Contact so a Turnaround Program can be established.
5.
End Items to be Inspected. All CH--47D, MH-47D, and MH-47E aircraft.
6.
Assembly Components to be Inspected. (Stratopower pumps).
NATIONAL STOCK NUMBER
PART NUMBER
NOMENCLATURE
Pumping Unit, Hydraulic
938555
64WE075102
Pumping Unit, Hydraulic
NOTE
The Boeing Helicopter part number for the above component is 145HS100--3.
Parts to be Inspected. Not applicable.
7.
8. Inspection Procedures. Perform a one time visual inspection of dataplates for part number and NSN
on all three (3) hydraulic pumps. Reference TM 55-1520-240-23P, Figure 178. Item 12 (1 pump) and Figure
183, Item 26 (2 pumps).
9. Correction Procedures.
a.
If the pump is NOT, repeat, NOT one of those listed in paragraph 6, the inspection is complete.
b. If the pump is one those listed in paragraph 6, report to the Logistical Point of Contact in accordance
with paragraph 15.b. It is NOT necessary to report Vickers pumps. The report shall include the aircraft serial
number, pump serial number, part number, field unit location, and point of contact.
NOTE
The twelve (12) modified Stratopower test pumps that have been flying under
an Airworthiness Release, with the part number of 145HS100-3, serial
number BO-XXX-CO or AO-XX-C. do not have to be reported.
The Logistical Point of Contact will provide instructions for remarking the
serial number and part number.
c. The Logistical Point of Contact will establish a Turnaround Program with field units. and will prioritize
the distribution of new pumps. They will provide instructions to the individual field unit POC's when the new
pumps are available for distribution. Instructions will also be provided for shipment of the old pumps to Strato-
power for modification.
d. New pumps that are manufactured will have a Stratopower part number of 939733, a Boeing part
number of 145HS100-4, and a serial number with a Prefix of "A1". Modified pumps will have the new
Stratopower part number of 939733. Boeing part number of 145HS100-4, and a serial number with a Prefix
of "A1".
e. Do Not remove the pumps from the aircraft until the new or modified pumps have been received.
New or modified pumps shall be changed out within seven (7) days of acceptance. After changing the pump,
contact the Logistical Point of Contact for shipping instructions. It is essential that the pumps be returned
to Stratopower in a expedient manner to maintain the schedule for modification.
f.
The projected completion date for this Turnaround Program is one (1) year from the date of this TB.
10. Supply/Parts and Disposition. Not applicable
11. Special Tools, Jigs and Fixtures Required. Not applicable.
12. Application.
a.
Category of Maintenance. AVUM. Aircraft downtime will be charged to AVUM.
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