Service Bulletin No. 544 B

Bearing Replacement Part Identitfication

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Supersedes Service Bulletin No. 544A

October 6, 2006


All Lycoming TIO-540-AE2A aircraft engines.


At overhaul or any time main or connecting rod bearings are replaced.

Although various bearings may fit different engines interchangeably, there are differences in material and construction that restrict the use of specific bearings to specific engine models.

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