As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, THE ENGINE EXPERIENCED AN UNCOMMANDED AND UNRECOVERABLE REDUCTION IN POWER ACCOMPANIED BY A REDUCTION IN FUEL FLOW AND COMPRESSOR SPEED. THE FLIGHT DIVERTED. P&WC WILL MONITOR THE INVESTIGATION OF THE EVENT AND WILL ADVISE OF ROOT CAUSE ONCE ESTABLISHED.