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-17 CHECK GALVANIC CORROSION WAS FOUND ON UPPER AND LOWER SURFACE OF LT AFT LAVATORY SUB-FLOOR PAN BETWEEN BS 1016 AND BS 1031, LBL 2 AND LBL 17, WL 208. MAINTENANCE REMOVED CORRODED LT AFT LAVATORY SUB-FLOOR WEB AND STRAP; FABRICATED A NEW REPLACEMENT WEB AND STRAP; INSTALLED REPAIR PARTS IAW B737-300 SRM 51-40-02.