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Rotax 912 valve spring retainers failing
https://data.ntsb.gov/.../GenerateNewestReport/102076/pdf
Ran across this report and was wondering if anyone has any additional info of this?
There have been 18 failures of valve spring retainers. 7 to 2000 hours. This recent one brought the plane down, thankfully no one was hurt but this is concerning since I can't seem to find any info on service bulletin info, other than a proper oil purge, which according the this NTSB report may or may not be the issue.
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