ONE TIME VISUAL INSPECTION AND REPLACEMENT OF CERTAIN P/N 4C3074 CRISSAIR, INC.,CHECK VALVE INSTALLED IN POWER CONTROL MODULE ASSEMBLIES IN THE PORT MARKED "FLT CONT PUMP" ONLY FOR ALL CH-47D, MH-47D, AND MH-47E AIRCRAFT

URGENT

* T B 1-1520-240-20-96

DEPARTMENT OF THE ARMY TECHNICAL BULLETIN

ONE TIME VISUAL INSPECTION AND

REPLACEMENT OF CERTAIN P/N 4C3074

CRISSAIR, INC.,CHECK VALVE

INSTALLED IN POWER CONTROL

MODULE ASSEMBLIES IN THE PORT

MARKED "FLT CONT PUMP" ONLY

FOR

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

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

27 MARCH 1997

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

NOTE

THIS PUBLICATION IS EFFECTIVE UNTIL RESCINDED OR SUPERSEDED.

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 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". Ninety days order, ship, and replace-

ment time is allowed once defective check valves are found. Pending availability, depots will replace defective

check valves prior to unit acceptance.

b. Aircraft in Depot Maintenance. Same as paragraph 1a.

c. Aircraft 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.

Maintenance Trainers (Category A, 8). Same as paragraph 1a.

This TB supersedes USAATCOM Message 1315142 MAR 97 (CH-47-97-ASAM-04)