As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPORTED LOUD GRINDING NOISE ON SHUT DOWN. COMPRESSOR WAS DISASSEMBLED DUE TO IMPELLER DRAGGING ON SHROUD AND FOUND NR 1 ROLLER BEARING HAD FAILED. UPON DISASSEMBLY, FOUND SEPARATE CAGE FOR ROLLERS BROKEN. APPROXIMATELY 80 DEGREES OF SEPARATOR CAGE BROKEN OFF. FOUND 2 EACH ROLLERS AND PARTS FROM SEPARATOR CAGE LAYING ON TOP OF BEARING INSIDE OF NR 1 BEARING HOUSING.