As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING B INSPECTION FOUND CORROSION ON FORE AND AFT ON CENTER FLOOR BEAM FOR LAV FLOOR BETWEEN FR 59 AND FR61. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED CENTER OMEGA BEAM DIGITAL GUSSET REF SRM 51-40-02. THE AIRCRAFT WAS RETURNED TO SERVICE.