Service bulletin · Lycoming

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Copies

OpenAirDocs holds no copy of this documentFAA or NTSB records cite it, as the list below shows. Service documents are published by their manufacturer, often to owners and operators only: ask Lycoming, a dealer or a repair station for the revision you need.
Manufacturer
Lycoming
Type
Service Bulletin
Number
366
Latest revision known
366C, dated June 2, 2016

A newer revision may exist than any OpenAirDocs knows of: check with the manufacturer.

Also cited in 2 NTSB investigations and 1 difficulty report.