We have had reports of heat related corrosion problems on the support brackets of both bleed switching valves. This bracket is easily identified by the black component decal. i.e. “LH Bleed Air valve” or “RH Bleed Air Valve”. Due to the high heat environment during engine operation and then cooling off after shut down, this bracket is prime for corrosion. The lower angle has completely corroded through on some Westwinds, and since this bracket angle supports the lower flange on the BSV, we now have a load bearing problem. The repair is either replacing this support bracket or accomplish an approved engineering repair. Since the part is a sub-part of a higher assembly, a special order may be required when you try to purchase the part.
P/N 783631-19
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