72-02-02 GRUMMAN AIRCRAFT: Amendment 39-1374 as amended by Amendment 39-1538. Applies to Type G-164A airplanes equipped with any P&W R-1340 model engine.
Compliance required within the next 25 hours in service, unless already accomplished, after the effective date of this AD.
To preclude the possibility of fuel leakage resulting from cracks in the threaded area of certain aluminum alloy fuel line fittings, accomplish the following:
1. Replace two AN911-3D pipe thread nipples located in the carburetor inlet line and one AN911-3D nipple located at the outlet boss of the in-line fuel strainer mounted on the firewall bulkhead with corrosion resistant steel nipples P/N AN911-3S, AN911-3K or AN911-3J.
2. Replace the aluminum AN912-4D reducer at the carburetor fuel inlet boss with corrosion resistant steel reducers P/N AN912-4S or AN912-4K or AN912-4J.
Grumman S/B No. 46 and 49 covers this same subject.
Amendment 39-1374 was effective January 20, 1972.
This Amendment 39-1538 is effective October 18, 1972.