As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LOWER FUSELAGE SKIN OF THE STRINGER 26L SKIN LAP SPLICE WAS FOUND CORRODED BETWEEN FS 720 +17 AND FS 740 NEAR AN A/C DUCT CUTOUT. THE DAMAGED SECTION OF SKIN WAS CUT AWAY AND REPAIRED WITH AN EXTERNAL ALUMINUM DOUBLER. THE REPAIR WAS ACCOMPLISHED PER ER/A 366954-14, REV A.