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 significant corrosion and rust particle contamination in instrument air systems, along with recurring failures of landing light switches, some emitting smoke.
• A Bellanca 17-30A Viking's nose landing gear failed due to fatigue in a linkage rod-end, causing a partial collapse upon touchdown.
• A Continental IO-550-N engine developed a severely chafed and leaking fuel injector line, with other lines also damaged by ignition leads.
• Two Aero Classic oil coolers failed prematurely due to leaks after very short operational times (23.6 and 53 hours).

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