SAIB NE-19-08: Lycoming Engines Parallel Valve Cylinders

Introduction

This Special Airworthiness Information Bulletin (SAIB) alerts, owners, operators, and certified repair facilities that all Lycoming Engines (Lycoming) engines equipped with certain Parallel Valve Cylinders and Head Assemblies, which were shipped from Lycoming between September 1, 2013 and April 30, 2015, have experienced cracking in service.

At this time, the airworthiness concern is not considered an unsafe condition that would warrant airworthiness directive (AD) action under Title 14 of the Code of Federal Aviation Regulations (14 CFR) part 39.

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