Service Instruction No. 1037 Y

SERVICE INSTRUCTION NUMBER 1037 Y

SUBJECT

Approved Pistons, Rings, Cylinders, and Gasket Set Application for Use on Lycoming Aircraft Engines

DATE

August 25, 2021

MODELS AFFECTED

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.