Supersedes Service Letter No. L240
May 27, 2009
To all Owners and Operators of Lycoming Aircraft Engines
The purpose of this Service Letter is to inform owners and operators of Lycoming aircraft engines what is indicated by the -70 or -85 suffix on the end of a Lycoming part number.
Product Support Network
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Get It Exchanged
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.