Federal Register #FAA20268789

FAA Directive: Replacement of Lycoming Engines Piston Pins (LW13445) for Safety Compliance

This opportunity concerns a Federal Aviation Administration (FAA) airworthiness directive targeting Lycoming Engines piston pins due to safety concerns. - Government Buyer: - Federal Aviation Administration (FAA), Department of Transportation - OEMs and Vendors: - Lycoming Engines (primary OEM) - Products/Services Requested: - Replacement of piston pins (part number LW13445) on Lycoming Engines Models O-235, O-540, and IO-540 - Approximately 957 engines affected - Oil change and visual inspection of engine oil filter, oil pressure screen, and oil suction screen for metal particulates - Unique or Notable Requirements: - Only piston pins eligible for installation may be used; installation of affected pins is prohibited - Compliance with Lycoming Mandatory Service Bulletin No. 667A and Service Instruction No. 1009BE is required - Directive addresses piston pin microcracks that can cause engine oil contamination and engine failure - Applies to piston pins produced between 2021 and 2025 - Additional Context: - The directive is part of a broader FAA safety action also affecting other OEMs (Leonardo S.p.A. and Rolls-Royce Deutschland), but this summary focuses on the Lycoming Engines requirement

Description

The FAA is issuing a new airworthiness directive (AD) for certain Lycoming Engines Model O-235, O-540, and IO-540 with a specific piston pin installed. This AD addresses piston pin failures that cause metal particulate contamination in engine oil and potential engine failure. Required actions include replacing the affected piston pin with an eligible part, performing oil changes, and visually inspecting the engine oil filter, oil pressure screen, and oil suction screen for metal particulates. The AD also prohibits installing the affected piston pin on any engine to prevent unsafe conditions.

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