As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BAND SEPARATED FROM ROTOR CAUSING CATASTROPHIC FAILURE OF ROTOR AND STATOR. BAND IS NOT AS SPECIFIED OR SUPPLIED ON THE GENERATOR BY ALLIED SIGNAL. PART DOES NOT CONFORM TO DESIGN DATA. APPEARS UNAUTHORIZED REPAIR MADE TO ROTOR USING UNAUTHORIZED PARTS. REPAIR OF ROTOR NOT AUTHORIZED BY REPAIR MANUAL.