Failed, Leaking, Chafed

Upon opening the instrument air, pressure regulator and manifold check valve assembly for inspection, heavy corrosion of the ferrous components were noted. Large rust particles were contaminating instruments. The submitter recommends Beechcraft develop a service bulletin or kit installing an inline filter after the instrument air regulator but before the instruments.

Key Takeaways:

• Beechcraft Model 58 Barons experienced severe corrosion and contamination in their instrument air systems, and a high incidence of landing light switch failures, some involving smoke or burning.
• A Bellanca 17-30A Viking's nose landing gear partially collapsed on touchdown due to a fatigue failure in a linkage rod-end, causing a runway excursion.
• Engine-related issues included a Continental IO-550-N with a severely chafed and leaking fuel injector line, and two Aero Classic oil coolers that failed prematurely after minimal operating hours.

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