MANDATORY MAINTENANCE FOR AFT LONGITUDINAL CYCLIC TRIM (LCT) ACTUATOR ON ALL CH-47D, CH-47F, MH-47D AND MH-47E AIRCRAFT

URGENT

TB 1-1520-240-20-167

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

MANDATORY MAINTENANCE

FOR

AFT LONGITUDINAL CYCLIC TRIM (LCT) ACTUATOR

ON ALL CH-47D, CH-47F, MH-47D AND MH-47E AIRCRAFT

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

30 May 2006

Approved for public release; distribution is unlimited.

DISTRIBUTION STATEMENT A:

NOTE

This message is effective until rescinded or superseded.

NOTE

This message is issued IAW AR 95-1 and has not been transmitted to units subordinate to ad-

dressees. Addressees will immediately retransmit this message to all subordinate units, activities

or elements affected or concerned. MACOMs will immediately verify this transmission to the

AMCOM SOF Compliance Officer (AMSAM-SF-A, safeadm@redstone.army.mil).

NOTE

MACOM Commanders may authorize temporary exception from message requirements IAW

AR 95-1, Ch 6. Exception may only occur when combat operations or matter of life or death in

civil disasters or other emergencies are so urgent that they override the consequences of continued

aircraft operation.

NOTE

Commanders unable to comply with the requirements of this message within the time frame spec-

ified will change the affected aircraft status symbol to a red //X//.

1. SUMMARY.

a. Background. Two of thirteen Aft Longitudinal Cyclic Trim (LCT) Actuators overhauled by professional aircraft

accessories were rejected because the lower rod end fitting was installed 180 degrees off. The rod end has a flat

side and a tabbed side. The tabs are anti-rotational lugs. The tabbed surface of the lower rod end fitting is to be

installed facing opposite the LCT motor side of actuator.

b. Message Purpose. Inspect for eleven suspect serial number LCT Actuators and Yoke Support Assembly

damage.

2. END ITEMS AFFECTED ALL H-47 SERIES AIRCRAFT.