As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED N2 OVERSPEED UNCONTROLLABLE WITH RPM TRIM MOTOR. NR 1 ENGINE RETURNED TO FLIGHT IDLE. FUEL JETTISONED, AND PILOT PERFORMED RUN-ON LANDING. REMOVED GOVERNOR AND FOUND DRIVE SPLINE DISENGAGED FROM GOVERNOR SHAFT. GOVERNOR REPLACEMENT FIXED PROBLEM.