As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN BS 1060 TO 1019 RBL 45.5 SHOW CORROSION. REMOVED LOCATED AND DRILLED NEW UPPER CHORD IAW BOEING DWG 111N5201 REV E AND INSTALLED NEW UPPER CHORD MCC BETWEEN STA 900 TO 1040 RBL 45.5 IAW BOEING DWG 1115201 REV E. THIS IS A MAJOR REPAIR.