Air Filters

Receiving inspection of new air filters (p/n P107336) revealed three out of four had a defective sealing surface, causing the sealing/mating surface to crack and crumble. This defective sealing surface could potentially enter the engine. The defective filters sealing surface has a light-gray color while the replacement filters we received, inspected and found to be in serviceable condition had a dark gray, almost black sealing surface. Suspect that the defective filters had improper material on the sealing surface or were improperly cured.

Key Takeaways:

• The article details multiple instances of air filter failures across various aircraft, with defects including loose gaskets, crumbling sealing surfaces, debonded felt seals, and split seams.
• These diverse filter failures consistently lead to severe engine complications, such as the ingestion of filter material or unfiltered air, resulting in engine stoppages, performance issues, and accelerated component wear.
• Problems are observed in both OEM and aftermarket filters, sometimes even on new or recently installed parts, indicating potential widespread quality or installation challenges across different aircraft models.

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