As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TURBOCHARGER IS A FACTORY OVERHAULED UNIT. TOTAL TIME OF PART IS UNKNOWN. THE SEAM JUST INSIDE THE EXHAUST INLET FAILED DUE TO HEAT STRESS WHICH IN TURN CAUSED A PREVIOUS WELDED REPAIR TO CRACK AS WELL. CAUSE OF FAILURE, TO BE RELATED TO HEAT STRESS AND AGE.