SL-682B Piper Required Inspection of Piston Pin

Piper Service Letter No. 682B

Reference: Lycoming Service Bulletin No. 3670, dated March 8, 1974

Applicability: See attached service letter for affected Lycoming engine models and serial numbers

System: Engine

Issue Date: April 16, 1974

Subject: Required Inspection of Part No. 69650 Piston Pin

Summary: Failure of part number 69650 piston pins, caused by transverse grinding or heat cracks which occurred during manufacture of the piston pin.

Open PDF: PIP_SL682B.pdf