As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE C-CHECK INSPECTION, CORROSION WAS DETECTED ON THE C-1 DOOR UNDER THE THRESHOLD PLATE. REPAIR ACCOMPLISHED REMOVAL OF DAMAGED AREA, FABRICATION AND INSTALLATION OF REPAIR FILLER AND DOUBLER IN ACCORDANCE WITH DOUGLAS STRUCTURAL MAINTENANCE MANUAL.