As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON LH CENTER WING UPPER SURFACE (WING BOX) BTW STGR 6-5 AND STGR 5-4 PAX CABIN. SUMMARY OF NRC 00693: CORROSION LEVEL 2. CORROSION ON LH CENTER WING UPPER SURFACE (WING BOX) BTW STGR 6-5 AND STGR 5-4 PAX CABIN WAS REPAIRED PER PRI 619399-14 REV 3 AND ERA 619399-14 AD REV ORIGINAL SECTION I: PERMANENT REPAIR. ASSOCIATED ER/A 14-619399 ADDED FOR AC 9550. (LP #0486415)