As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT MAIN CABIN LONGITUDINAL BEAM AT FR 70 RBL 30 HAD CORROSION AT LAVATORY ATTACH POINT HOLE GROUNDED - YES. REMOVED AND REPLACED AFT MAIN CABIN LONGITUDINAL BEAM BETWEEN FR 66-70 AT RBL 30. REF AIRBUS DWG D53472836, D53472458, D53472093