As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
COMPRESSOR WHEEL OF TURBO CHARGER WAS FOUND DAMAGED AND SEIZED BY DEBRIS. UPON DISASSEMBLY, A SMALL PIECE OF A BAND (BREEZE TYPE) CLAMP WAS FOUND BETWEEN THE COMPRESSOR WHEEL AND THE HOUSING PREVENTING THE WHEEL FROM TURNING. THE LAST SERVICE ON THIS AIRCRAFT WAS DONE 23.3 HOURS AND 54 DAYS PRIOR TO THE PROBLEM BEING FOUND. SUSPECT THAT A PIECE OF THE CLAMP FELL INTO THE INTAKE FOR THE ALTERNATE AIR AND REMAINED THERE UNTIL IT BECAME DISLODGED AND ENDED UP IN THE COMPRESSOR.