Supersedes Service Instruction 1037P and obsoletes Service Instruction 1243 and 1526B.
APPROVED PISTONS, RINGS AND CYLINDERS FOR USE ON LYCOMING AIRCRAFT ENGINES
DATE: January 9, 2017
All Lycoming opposed series aircraft engines in Table 1.
TIME OF COMPLIANCE:
When installing new rings, pistons, valves and cylinders.
REASON FOR REVISION:
Updated part numbers; added IO-390-C Series engine models.