As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION WAS FOUND ON THE AFT CARGO DOOR NUMBER 4 BEAM INNER CHORD AT APPROXIMATELY DOOR STATION 170. THE CORROSION IS LOCATION ON THE INNER SURFACE OF THE UPPER HORIZONTAL FLANGE COMMON TO THE FACTORY NUT PLATE. REMOVED CORROSION AND PERFORMED HIGH FREQUENCY EDDY CURRENT INSPECTION WITH NO FINDINGS. ENGINEERING AUTHORIZATION COMP-52-008732.