As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CHECK VALVE FAILED AND ALLOWED THE RT ENGINE BLEED AIR TO FLOW UNABATED FROM RT ENGINE ACROSS AND INTO THE LT ENGINE VIA THE AIRCRAFT BLEED AIR LINES DURING IN FLIGHT RESTARTS OF THE LT ENGINE. HOT BLEED AIR GASES DISTURBED THE NORMAL AIRFLOW INTO THE LT ENGINE COMBUSTION CHAMBER AND CAUSED THE LH ENGINE TO HAVE A RAPID ITT RISE RESULTING IN AN ENGINE HOT START AND RESULTANT TEARDOWN/OVERHAUL OF THE ENGINE.