As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A RAPID DESCENT, THE ENGINE SURGED ACCOMPANIED BY TORQUE FLUCTUATIONS. THE ENGINE WAS SHUT DOWN IN FLIGHT AND THE AIRCRAFT PROCEEDED TO DESTINATION. SUBSEQUENT INVESTIGATION WAS UNABLE TO REPRODUCE THE PROBLEM. THE ENGINE BLEED VALVE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.