As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FINAL APPROACH NR 1 ENG DRIVEN GEN FAILED. AFTER LANDING NR 1 ENG FIRE WARNING ILLUMINATED AND BELL CAME ON. FIRE HANDLE WAS PULLED AND BOTH BOTTLES DISCHARGED. AFTER OPENING COWLING FOUND THE CSD AND GEN TO BE THE SOURCE OF IGNITION. REPLACED CSD AND GENERATOR, OPERATIONAL CHECK NORMAL.