Supersedes Service Instruction No. 1427B
December 29, 2010
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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