As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND AT RH WING NO.4 SLAT SLAT STA.13 , BETWEEN OUTER SKIN AND TEE CHORD. CUT & REMOVED THE DAMAGED AREA FROM RH WING NO.4 SLAT STA13 2.MADE REPAIR DOUBLER & FILL TO INSTALL WITH SEALANT I.A.W B737-300 SRM 57-43-01 REPAIR 6 FIG201(REV134) REF BOEING DWG 65C26603 SHEET 6 FOR MATERIAL ID & PART INFO