URGENT
TB 1-1520-238-20-77
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
REMOVAL AND REPLACEMENT
OF MAIN ROTOR BLADE TIP
WEIGHT RETENTION NUTS ON
ALL AH-64 HELICOPTERS
Headquarters, Department of the Army, Washington, D. C.
24 June 1996
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
1. Priority Classification. Urgent
a. Aircraft in Use. Upon receipt of this Technical Bulletin (TB) the condition status symbol of the cited
aircraft will be changed to a red horizontal dash//-//The red horizontal dash//-// may be cleared when the
correction procedures of paragraph 9 below are 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. Aircraft will not be issued until compliance with this TB has been
completed.
c. Aircraft Undergoing Maintenance. Same as paragraph 1 a. above.
d. Aircraft in Transit.
(1) Surface/Air Shipment. Same as paragraph 1 a. above.
(2) Ferry Status. Inspect at final destination. Same as paragraph 1 a. above.
e. Maintenance Trainers (Category A and B). Same as paragraph 1a. above.
f. Component/Parts in Stock Including War reserves at all levels (depot and others). Upon receipt of this
message the material condition tags of all items in all condition codes listed in paragraph 6 below shall be
annotated to read, "TB 1 -1520-238-20-77, replacement of tip weight retention nuts not complied with."
(1) Material located in all wholesale depots including all satellite wholesale depots and war
reserve depots. Report receipt of this TB in accordance with paragraph 14b(1). Upon receipt of this TB depot
commanders and others maintaining wholesale stock shell ensure that serviceable material (condition codes A,
B. and C) is placed in condition code J and tagged with a suspended tag/label - material DO Form 1576/1576-
1. Annotate the remarks block with UTB 1-1520-238-20-77, replacement of tip weight retention nuts, not
complied with." Do not remove existing material condition tags. Report compliance with this TB in accordance
with paragraph 14c(1).
This TB supersedes USMSAATCOM Aviation Safety Action Message 291 90Z May 96 AH-64-96-ASAM-07.
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