Mufflers

While carrying out Canadian AD CF90-03-R2, large leaks were found in the area surrounding the muffler tail pipe area under the structure for supporting the heat muff shroud. No defects were noticed in a visual inspection of this area. No data tag was on the muffler, so its assumed it is an original unit. The operators logs dont show it ever being changed.

Key Takeaways:

• Aircraft exhaust systems are prone to diverse failures, including leaks, internal component separation, failed spot welds, and deteriorated ball joints.
• These defects are often challenging to detect through visual inspection and can lead to serious safety concerns, such as carbon monoxide warnings or engine performance issues.
• Reported incidents affect a variety of aircraft models and operating times, indicating a general susceptibility of exhaust systems to degradation and wear.

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