Service Instruction No. 1427 C

Lycoming Reciprocating Engine Break-In and Oil Consumption

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Supersedes Service Instruction No. 1427B

December 29, 2010 

MODELS AFFECTED

All fixed  wing  and  rotary wing  aircraft (horizontal installations only) with  Lycoming reciprocating aircraft engines installed 

TIME OF COMPLIANCE

After field overhaul

This Service Instruction identifies the  necessary steps for engine break­in, including engine preparation  for ground operational tests, flight tests, after­flight tests, and oil consumption limits for Lycoming engines installed in fixed wing and rotary aircraft.

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