As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GENERATOR FAILURE WAS TRACED TO THE FAILURE OF BAND SECURING ROTOR WINDINGS. FAILED BAND WAS AN UNAPPROVED DESIGN. BAND WAS CONSTRUCTED OF SOLID PIECE RING. ORIGINAL DESIGN IS A LAYERED WRAPPING, THEN SPOT WELDED. MFG MANUAL STATED NO REPAIR OF BAND IS PERMITTED.