76-22-04 MITSUBISHI HEAVY INDUSTRIES, LIMITED: Amendment 39-2757. Applies to Model MU-2B-30 airplanes with serial numbers 502 through 547 and Model MU-2B- 35 airplanes with serial numbers 501 and 548 through 615, certificated in all categories.
Compliance is required as indicated, unless already accomplished.
To prevent the binding of the main landing gear forward door emergency operating cables and subsequent inability to manually extend the landing gear, accomplish the following:
(a) Within the next 50 hours time in service after the effective date of this AD, and thereafter at intervals not to exceed 100 hours time in service from the last inspection, inspect the main landing gear forward door emergency operating cables in accordance with the instructions section contained in Mitsubishi Service Bulletin No. 170 dated May 16, 1975 or an equivalent approved by the Chief, Engineering and Manufacturing District Office, FAA Pacific-Asia Region, Honolulu, Hawaii.
(b) If, during an inspection required by paragraph (a) of this AD, the cable actuating force is found to exceed 88 lbs, the cable rewinding requires unusually heavy force, the cable rewinding is rough, or the inner cable coating is scraped, replace the cable with another cable of the same part number in accordance with the replacement section contained in Mitsubishi Service Bulletin No. 170 dated May 16, 1975, or an equivalent approved by the Chief, Engineering and Manufacturing District Office, FAA, Pacific-Asia Region, Honolulu, Hawaii, and thereafter continue to comply with paragraphs (a) and (b) of this AD.
(c) The repetitive inspections required by this AD may be discontinued upon the installation of the newly designed cables, P/N 030A-38558-41 left hand and P/N 030A-38558-51 right hand in accordance with the replacement section contained in Mitsubishi Service Bulletin No. 170 dated May 16, 1975, or an equivalent approved by the Chief, Engineering and Manufacturing District Office, FAA, Pacific-Asia Region, Honolulu, Hawaii.
This amendment becomes effective November 15, 1976.