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Aren't they made in China?
A customer of mine, d.o.m/chief pilot on a Gulfstream G-IV, told me Rolls Royce Canada subs out turbine wheel manufacture to China. QA in Canada rejects over 68% of the wheels coming from there. think about it. Over 60 out of a 100 that Chinese manufacturers say is good go right in the trash.
In your case - a cheap casting spinning at 15K rpm. Asking for trouble.
Does Arma's supplier X-Ray the castings? Any other NDT? Eddy current testing?
When will we learn that stuff from that area is usually sub-par?
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