Maintenance Matters

September 2017 Issue

Lycoming Rod SB: How Large a Problem?

Lycoming says about 1300 factory engines are affected, plus an unknown number of field overhauls. Inspections are onerous.

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.

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