Lycoming Rod SB: How Large a Problem?
As we go to press in early August, Lycoming, field shops and owners were struggling to clarify a service bulletin that requires inspection and possible replacement of connecting rod bushings in hundreds of Lycoming engines. The mandatory service bulletin-SB632-was announced on July 17, just ahead of AirVenture. Two weeks later, shops tell us they are still fielding calls from worried owners trying to understand the scope of the bushing issue.