Maint Transmission Replacement Time , AH-64 Series Helicopters

URGENT

*TB 1-1520-238-20-132

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

MAIN TRANSMISSION REPLACEMENT TIME, AH-64

SERIES HELICOPTERS

Headquarters, Department of the Army, Washington, D.C.

15 August 2003

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

NOTE

THIS PUBLICATION IS EFFECTIVE UNTIL RESCINDED OR SUPER-

SEDED.

NOTE

This Technical Bulletin (TB) is issued IAW AR 95-1 and has not been trans-

mitted to units subordinate to addressees. Addressees will immediately re-

transmit this message to all subordinate units, activities or elements af-

fected or concerned. MACOM's will immediately verify this transmission to

the AMCOM SOF Compliance Officer (AMSAM-SF-A, safeadm@reds-

tone.army.mil).

NOTE

MACOM commanders may authorize temporary exception from technical

bulletin (TB) requirements IAW 95-1, Ch. 6. Exception may only occur when

combat operations or matter of life or death in civil disasters or other emer-

gencies are so urgent that they override the consequences of continued air-

craft operation.

1. Summary 

1.1 Background SOF message AH-64-00-03 established a retirement life of 750 flight hours for the

primary and secondary clutch assemblies inside the accessory gearbox portion of the main transmission.

Recent re-examination of the probabilities, components, and flight history has resulted in an increase in the

retirement life for these components.

1.2 TB Purpose

1.2.1 Establish a new retirement life of 1000 flight hours for the primary and secondary clutch assemblies

inside the accessory gearbox portion of the main transmission.

*This TB supersedes TB 1-1520-238-20-132 dated 14 February 2003