Squawk Box

December 2010 Issue

Failed, Leaking, Chafed

The following information is derived from the FAA’s Service Difficulty Reports and Aviation Maintenance Alerts.

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.

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