As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH BACKUP GENERATORS FAILED. RESET ATTEMPT FAILED. ALSO SMELLED SMOKE ODOR. A BURNED BACKUP CONVERTER CAPACITOR FOUND BY SHOP 147 WAS LATER CONFIRMED BY HAMILTON SUNDSTRAND WHO SERVICES THE UNIT AS THE CAUSE OF FAILURE. THE CAPACITOR WAS REPLACED AND THE UNIT RECERTIFIED. NO AIRCRAFT OR BUG PROBLEMS WERE REPORTED AFTER CONVERTER REPLACEMENT.