As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG 2777378) LH WING #4 SLAT LOWER SURFACE AND UPPER SURFACE OF TE WEDGE HAS AREA WITH EVIDENCE OF CORROSION 4" IB OF SLAT ANTI ICE TUBE. ACCOMPLISHED REPAIR ON LEFT WING SLAT #4 FTN 6A8917, LOWER SURFACE AND UPPER SURFACE OF TE WEDGE 4" IB OF SLAT ANTI ICE TUBE IAW ER/A 608291-14 REV ORIG. AND B737 SRM 57-42-01-2R REPAIR 11.