As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PHASE INSPECTION THE TURBOCHARGER BEARING FLANGE WHERE IT MEETS THE TURBOCHARGER TURBINE WAS CRACKED IN TWO PLACES CAUSES EXHAUST GAS TO JET OVER THE TOP OF THE TURBOCHARGER. OTHER FAILURES HAVE BEEN FOUND IN OUR FLEET AS WELL. NO CAUSE KNOWN OR RECOMMENDATIONS AT THIS TIME.