51-02-02 TEMCO: Applies to All Models GC-1A and GC-1B Airplanes Through Serial Number 3760, Except Those Equipped With Hanlon-Wilson Muffs.
Compliance required by February 15, 1951.
To prevent engine malfunctioning due to pieces of asbestos from the carburetor heat muff entering the carburetor, remove all asbestos strips on the right-hand (carburetor heat) muff. After removal of the asbestos, peen the muff collars to provide a tight fit on the exhaust stacks.
This supersedes AD 47-25-08.