Service Instruction No. 1512

Main and Connecting Rod Bearing Upgrade

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DATE: September 23, 2004


All Lycoming model engines.


Whenever new bearings are installed.

Lycoming has recently upgraded the main and connecting rod bearings. The superseded bearing part numbers and the upgraded bearing part numbers are shown in the table below. Lycoming requires the use of the upgraded bearing whenever new bearings are installed.

Overhauled Engines

A Lycoming overhauled engine puts you back in flight in no time. Exchange your like-model complete operating engine for full core value and update to the most current features and parts backed by a Lycoming warranty.

Related Publication

Supplement No. 1 to Service Instruction No. 1512

For more information on this topic, refer to Supplement No. 1 to Service Instruction No. 1512.