AD 76-05-03

76-05-03 UNITED AIRCRAFT OF CANADA LIMITED: Amendment 39-2535. Auxiliary Power Unit Model ST6L-73.

Compliance required as indicated unless previously accomplished. To preclude leakage of the Sundstrand Aviation 025277 series fuel pump without the part number 5002557 injector cap and screen assembly, accomplish the following:

(a) Within the next twenty hours in service after the effective date of this AD, unless previously accomplished, inspect all fuel pumps with less than 250 hours time in service since new in accordance with paragraph 2, Accomplishment Instructions of Pratt & Whitney of Canada Limited Alert Service Bulletin No. 9046 dated August 19, 1975, or approved equivalent inspection.

(b) Within the next 250 hours in service after the effective date of this AD, unless previously accomplished, install part number 5002557, injector cap and screen assembly, in accordance with paragraph 2, Accomplishment Instructions of Pratt & Whitney Aircraft of Canada Limited Service Bulletin No. 9043, dated September 2, 1975, or approved equivalent instructions.

The aircraft may be flown in accordance with FAR 21.197 to a base where the alteration or inspection can be performed.

An equivalent alteration or inspection must be approved by the Chief, Engineering and Manufacturing Branch, of the Eastern Region of the FAA.

This amendment is effective March 9, 1976.