As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C-18 CHECK CORROSION WAS FOUND ON AFT LAVATORY MAIN DECK STIFFENER STRAP BS 1016, LBL 6 TO RBL 6. MAINTENANCE REMOVED CORRODED STIFFENER STRAP BS 1016, LBL 6 TO RBL 6; FABRICATED A NEW REPLACEMENT STRAP PER DWG 65-46812; INSTALLED REPAIR PART IAW B737-300 SRM 51-40-02, FIG 9, PG 39.