As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE INSTALLED ANTI-ICE VALVE (PN 23053192AL) POPPET SEAT RETAINING SCREW WAS NOT PROPERLY STAKED DURING THE MFG PROCESS AND AS A RESULT THE SCREW WAS INGESTED INTO THE TURBINE SECTION OF THE ENGINE AND DAMAGED THE NR 1, 2, 3 WHEELS, THE 1ST, 2ND AND 4TH STAGE NOZZLES BEYOND ACCEPTABLE LIMITS. AS A RESULT OF THE IMPACT DAMAGE TO THE NR1 WHEEL THE NR 8 BEARING WAS ALSO DAMAGED BEYOND ACCEPTABLE LIMITS. ALL DAMAGED PARTS HAD TO BE REPLACED. FORTUNATELY THIS DAMAGE WAS DISCOVERED DURING AN INSP AND THE ENGINE DID NOT COME APART IN FLIGHT.