ONE TIME VISUAL INSPECTION OF FORWARD TRANSMISSION MOUNTING (BARREL) NUTS, P/N NAS 577B20A FOR ALL CH-47D, MH-47D, AND MH-47E AIRCRAFT

EMERGENCY

*TB 1-1520-240-20-91

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

ONE TIME VISUAL INSPECTION OF FORWARD

TRANSMISSION MOUNTING (BARREL) NUTS,

P/N NAS 577B20A

FOR

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

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

02 December 1996

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

NOTE

THIS PUBLICATION IS EFFECTIVE UNTIL RESCINDED OR SUPERSEDED.

Priority Classification - Emergency

a. Aircraft in Use - Upon receipt of this Technical Bulletin (TB) the condition status symbol of

the cited aircraft shall be immediately changed to a Circled Red "X". The Circled Red "X" may be

cleared when the inspection and correction procedures of paragraph 8 and 9 below are complete.

Aircraft on a Circled Red "X" status symbol shall be maintained in flyable storage condition.

b. Aircraft in Depot Maintenance - Inspect and correct prior to issue. Aircraft shall not be

issued until compliance with this TB has been completed.

Aircraft Undergoing Maintenance - Same as paragraph 1a.

Aircraft in Transit -

(1) Surface/Air Shipment - Same as paragraph 1a.

(2) Ferry Status - Same as paragraph 1a.

e. Maintenance Trainers (Category A,B) - Same as paragraph 1a.

*This TB supersedes USAATCOM Message 141510Z November 1996 (CH-47-97-01)