Quote:
Originally Posted by Aerospike
Or a blade fractured and damaged the rest of the blades. I've seen it happen on turbofan engines. If one blade had a casting imperfection, it would crack under the CF loads and broken piece would damage the rest of blades. Can you tell if it's a FOD hit or blade failure, not without a Scanning Electron Microscope.
However, if someone were working upstream of the turbo, the more likely scenario is hey somehow caused the damage.
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I'd go with this! Can the prove it wasn't the impellor of the turbo itself that failed and became the FO? Something else would have to be missing upstream, and it isn't....