As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3812 LT WING TANK PLATE OPENING HAS FRETTING CORROSION 531AB. CORRECTIVE ACTION: SUMMARY SEE NR FOR ADDITIONAL INFORMATION 003-0007:5700-2543/019 00399 CLEANED AREA CHECKED LIMITS / REPAIR REF: B737 SRM 57-20- 01 REPAIR 1. (1318640).