As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT (FL 1284) FLIGHT DEPARTED CLT WITH NR 1 CSD ON MEL. APPROXIMATELY 30 MINUTES OUT CLT, THE APU OVERSPED AND SHUT DOWN. THE AIRCRAFT DIVERTED INTO RIC DUE TO ONE ELECTRICAL SYSTEM ON LINE. AN EMERGENCY WAS DECLARED,THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MTC REPLACED THE APU. OPERATIONALLY CHECKED OK. (X)