New service bulletin/recall on crankshafts manufactured by Lycoming: http://www.lycoming.textron.com/support ... /SB566.pdf
Good Luck,
Mahlon
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Make sure you check serial numbers...it's not ALL crankshafts. Also only affects those that have been overhauled/rebuilt since March 1, 1999. It's an NPRM right now, so it will probably become an AD very soon.