As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DISASSEMBLY OF TURBINE FOR REPAIR DUE TO BLOWING OIL OUT OF EXHAUST, FOUND DOME AND SHIELD HAD HEAVY OIL STAINS AND DOME PART SEPARATED FROM INNER BAND AND CRACKED. SUBMITTER SUGGESTED POSSIBLY DUE TO TIGHT FIT TO NEW NR 1 FLOATING DIAPHRAGM NOZZLE AND POSSIBLE VIBRATION. (FIRST RUN ON THE NOZZLE). ASSURE NR 1 NOZZLE SHIELD HAS SNUG TO LIGHT LOOSE FIT TO ALL NR 1 NOZZLES. EXTREME TIGHT FIT AT TANGS TO SADDLE COULD CAUSE THIS PROBLEM.