URGENT
*TB 1-1520-240-20-102
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
ONE TIME INSPECTION FOR AFT TRANSMISSIONS
WITH SUSPECTED IMPROPERLY SHIMMED INPUT
PINION GEAR ASSEMBLY
ALL CH-47D, MH-47D, AND MH-47E AIRCRAFT
Headquarters, Department of the Army, Washington, D. C.
21 May 1998
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
NOTE
THIS PUBLICATION IS EFFECTIVE UNTIL RESCINDED OR SUPERSEDED.
1.
Priority Classification.
Urgent.
a. Aircraft in Use. Upon rec eipt of this Technical Bulletin (TB) the condition status symbol of the cited aircraft will be
changed to a red -. The red- may be cleared when the inspection of paragraph 8 below is completed. The affected
aircraft shall be inspected as soon as practical, but no later than the task/inspection suspense date. Failure to comply
with the requirements of this TB within the time frame will cause the status symbol to be upgraded to a red x.
b. Aircraft in Depot Maintenance. Same as paragraph 1a.
c. Aircra ft Undergoing Maintenance. Same as paragraph 1a.
d. Aircraft in Transit.
(1) Surface/Air Shipment Same as paragraph 1a.
(2) Ferry Status. Same as paragraph 1a.
e. Maintenance Trainers (Category A and B). Same as paragraph 1a.
f. Component/Part s in Stock Including War Reserves at All Levels (Depot and Others).
(1) Wholesale Stock. Wholesale stock has been inspected for suspect transmissions.
(2) Retail Stock. Report receipt of this TB in accordance with paragraph 14c(2). Upon receipt of t is TB,
h
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. Report compliance with this TB in accordance with paragraph 14d(2).
*This TB supersedes USAAMCOM Message 141621Z MAY 98 CH-47-98-04 (SOF).
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