Piper PA-23-250 Aeroplanes with Lycoming IO-540-C4B5 Engines (Exhaust systems)
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Owners and operators should immediately inspect crossover exhaust assemblies on Piper PA-23-250 aircraft with Lycoming IO-540-C4B5 engines that have reached or exceeded the engine's time between overhaul (TBO). Inspections should then be repeated every 50 flight hours or every 180 calendar days, whichever occurs first. Any damaged or seized parts must be repaired or replaced with FAA-approved components before further flight, following the detailed inspection steps provided in the Piper Aztec Service Manual.
Summary
The Special Airworthiness Information Bulletin SAIB: CE-12-44 is an FAA informational bulletin concerning the exhaust systems of Piper PA-23-250 (Aztec) aircraft equipped with Lycoming IO-540-C4B5 engines. It addresses airworthiness concerns related to the engines' crossover exhaust assemblies, highlighting potential durability and functional issues without mandating regulatory action. The bulletin provides guidance for inspection and maintenance to prevent exhaust system failures.
What changed
SAIB CE-12-44 introduces a recommendation for owners and operators of Piper PA-23-250 aircraft with Lycoming IO-540-C4B5 engines to perform regular inspections of the crossover exhaust assemblies. It outlines specific inspection procedures and intervals to identify and address issues such as chafing, cracking, and exhaust leaks. This bulletin does not impose mandatory requirements but serves as an advisory to enhance safety and durability.
Why it matters
This bulletin is important for aviation professionals because it highlights potential exhaust system failures that could lead to increased noise, smoke, heat damage, or even engine fires. Operators and maintenance organizations can use this information to proactively inspect and maintain critical exhaust components, thereby reducing the risk of in-flight issues and ensuring continued airworthiness. Compliance teams benefit from understanding these recommendations to support safety management and risk mitigation.
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