As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE "C4 PLUS A6 CHECK, CORROSION DAMAGE WAS DETECTED AT THE UPPER SURFACE OF RT WING LOWER SKIN PANEL BETWEEN WS 1289 - WS 1312. THE CORROSION DAMAGE WAS SPREAD OVER A WIDTH OF 15" WITH A DEPTH OF 3" AS DOCUMENTED IAW NRC 50723. AFTER BLENDING, THE REMAINING THICKNESSES OF THE REWORKED MATERIAL FROM THE REWORKED EXCEEDED THE MAXIMUM ALLOWABLE OF SRM 57-30-01, FIG 1.