# Proposed AD 97-ANE-42-AD: Superior Air Parts, Inc., Piston Pins Installed on Textron Lycoming Reciprocating Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 18, 1998, 63 FR 8149
- Comments due: March 20, 1998
- Docket: 97-ANE-42-AD
- FR document: 98-3797
- Official PDF: https://openairdocs.org/files/sha256/e1/ee/e1ee9b533971d3d21fa1af3fc301c91d9d8efc9d0d2e219fd37bee4d711d7f7a (from https://www.govinfo.gov/content/pkg/FR-1998-02-18/pdf/98-3797.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/02/18/98-3797/airworthiness-directives-superior-air-parts-inc-piston-pins-installed-on-textron-lycoming
- Page: https://openairdocs.org/proposed/97-ANE-42-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Superior Air Parts, Inc., piston pins installed on Textron Lycoming reciprocating engines. This proposal would require removal from service of defective piston pins, and replacement with serviceable parts. This proposal is prompted by reports of numerous piston pin fractures. The actions specified by the proposed AD are intended to prevent the piston pin from puncturing the engine crankcase by the connecting rod, resulting in the loss of oil leading to total power failure and possible fire, or freeing the connecting rod, possibly puncturing the cylinder or jamming the engine crankshaft, resulting in catastrophic engine failure.

## Notices in this docket

- Feb 18, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-3797, comments due Mar 20, 1998 (https://www.federalregister.gov/documents/1998/02/18/98-3797/airworthiness-directives-superior-air-parts-inc-piston-pins-installed-on-textron-lycoming)

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