Service Letter No. L 285

Change in cylinder configuration for O-235-C, -E, and -H Series engines

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SERVICE LETTER NO. L285
Change in cylinder configuration for O-235-C, -E, and -H Series engines
DATE:

August 25, 2021

TO:

All Owners and Operators of Lycoming O-235-C, -E, and -H Series engines

REASON FOR PUBLICATION:

Lycoming supplied cylinders for O-235-C, -E, and -H Series engines were previously plain steel, straight-bore cylinders. This design has been replaced with nitrided, choke-bore cylinders.

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