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 531BB. CORRECTIVE ACTION: SUMMARY SEE NR FOR ADDITIONAL INFORMATION 003-0007:5700-2543/018 00398 CLEANED AREA CHECKED LIMITS / REPAIR REF: B737 SRM 57-20- 01 REPAIR 1. (1318641).