As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE DISASSEMBLED FOR REPAIR OF COMPRESSOR. AT DISASSEMBLY, 9TH STAGE DISK DOUBLE LIPPED REAR ROTATING AIRSEAL, WAS FOUND TO BE CRACKED IN 3 PLACES, APPROXIMATELY 0 , 30, AND 120 DEGREES. ENGINE WAS OPERATED UNDER NORMAL CONDITIONS AND NO ABNORMALITIES WERE FOUND DURING ENGINE PRE RUN PRIOR TO DISASSEMBLY. BELIEVE CRACKING MAY BE FROM THE TIGHT FIT FOUND DURING INSTALLATION AND REMOVAL OF THE SEAL FROM THE DISK EVEN WHEN HOT AND COLD PRACTICES ARE USED.