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 LOWER KEEL BEAM EXTERNAL PLATING AT FUSELAGE STATION 699.5. REPAIR ACCOMPLISHED REMOVAL OF THE DAMAGED AREA, FABRICATION AND INSTALLATION NEW EXTERNAL PLATING AND TWO REPAIR DOUBLERS IN ACCORDANCE WITH FAA DER APPROVED DRAWING E78-R01 AND ENGINEERING ORDER 53-DC8-914.