>I didn't see anything on the Av-web website on crankshafts. Is this the
>AD on cranks installed after 1 March, 1999?

The FAA has issued a NPRM on an expanded Lycoming Crank AD for 360 cu. in.
displacement engines:


You can check your engine model and serial number if you have something
other than the stock O-360-A4K in your Sundowner. None of the engines are
less than 360 cu.in. models, so 150-160 HP Musketeers are unaffected.

Supers and Sierras could be, depending on the exact engine you have and if
the crank has been replaced recently.


Click on "Supplement 1 to SB 566" link to see the engine models and serial
numbers, and the serial numbers of the "bad" cranks.

Bob Steward, A&P IA
Birmingham, AL

Join BAC today and be a part of the ONLY Type Club for the Musketeer series!


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