SERVICE INSTRUCTION NUMBER 1037 Y
Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines
August 25, 2021
All Lycoming opposed series aircraft engines in Table 1
TIME OF COMPLIANCE
When installing new rings, pistons, valves, and cylinders
REASON FOR REVISION
Removed Table 1 – Alternate Piston Ring P/Ns. Changed all table references from Table 2 to Table 1. Updated listing for low compression O-235 series, including addition of notes on page 17. Add listing for O-360-J2A and O-540-F1B5 updating intake valve. Updated notes on page 17.
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