As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DIVERSION TO CVG DUE TO THE LEFT ENGINE ROLLED BACK. DESCENDED IN ALTITUDE AND THE LEFT ENGINE BEGAN TO PRODUCE DESIRED POWER. REPLACED FUEL PUMP, HMU, ECU AND 5TH STAGE CHECK VALVE. HPC AND LPT BORESCOPES PERFORMED WITH MINOR FINDINGS IN HPC, DAMAGE WAS BLENDED PER AMM.