Piper PA-46 Malibu Mirage — Service Bulletins

This document is Service Letter No. 578B issued by Piper Aircraft, Inc. on July 27, 2011, and it supersedes Service Letter No. 578A. The primary focus of this service letter is to address the inspection and installation of fuel lines (stainless steel tube assembly) and support clamps for various Piper aircraft models, including the PA-46-350P Malibu Mirage. The revision is prompted by the update of Lycoming Service Bulletin No. 335A to No. 342F, which expands maintenance procedures and includes additional engine models. Compliance with the attached Lycoming Service Bulletin is mandatory every 100 hours, during annual inspections, overhauls, and whenever engine fuel lines or clamps are serviced, removed, or replaced. The document aims to minimize the hazards associated with fuel line damage, ensuring safety and reliability in aircraft operations.

• The service letter is effective upon receipt and mandates compliance with Lycoming Service Bulletin No. 342F.
• Affected models include the PA-46-350P Malibu Mirage, with serial numbers 4622001 through 4622200 and 4636001 and up.
• Inspection of fuel lines and clamps is required every 100 hours and during annual inspections.
• Operators must replace any faulty fuel lines and ensure proper installation of support clamps to prevent damage.
• The document emphasizes the importance of maintaining a minimum clearance of 3/16 inch between fuel lines and any engine or airframe surfaces.