As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE REMOVED FOR ''''PERFORMANCE DETERIORATION''''. THE NR 4 BEARING EXHIBITED AXIAL SCORING OF THE ROLLERS AND OUTER RACE. MINOR FATIGUE SPALLING WAS PRESENT AT THE DAMAGE SITES ON BOTH THE RACE AND ROLLERS. INVESTIGATION IS IN PROGRESS AT GE ENGINE SERVICES - DALLAS. (X)