As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ROUTINE SOAP SAMPLE WAS FLAGGED FOR M50 STEEL (BEARING MATERIAL) IN FILTER. ENGINE WAS REMOVED AND SENT TO A REPAIR STATION, WHERE IT WAS FOUND THAT THE COMPRESSOR BEARING WAS FAILING. THE ENGINE WAS REPAIRED AND REINSTALLED AND THE AIRCRAFT RETURNED TO SERVICE.