Service Bulletin No. 667 A

Publications
DATE RELEASED

March 12, 2026

SUBJECT

Piston Pin Replacement

MODELS AFFECTED

All Lycoming Engines or Cylinder Kits using LW-13445 Piston Pins, or Spare LW-13445 Piston Pins with an 8130-3 dated between January 7, 2021, and December 15, 2025.

TIME OF COMPLIANCE

Refer to Required Action.

REASON FOR REVISION

Corrected Date Range in models affected and paragraph one.

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