As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FUSELAGE SKIN AND FACTORY .020 THICK DOUBLER WERE FOUND CORRODED AT FS 1645 AT STRINGER 29. THE CORROSION WAS REMOVED WITH A 21 (LONGITUDINAL) X 4.4 (CIRCUMFERENTIAL) CUTOUT THROUGH THE SKIN AND DOUBLER. THE CUTOUT WAS REPAIRED WITH AN EXTERNAL ALUMINUM DOUBLER AND TRIPLER PER ER/A 369725-14, REV A.