As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT WET AREA SUPPORT STRUCTURE UNDER LAV D CORRODED.AREAS MARKED IN RED. GROUNDED - YES. SUPPORT STRUCTURE PN: 147A5690-3, FOUND TO BE MORE THAN 50% CORRODED IAW B737-800 SRM 53-70-51-1A-1 AND OUT OF LIMITS.LOCATED DRILLED AND INSTALLED NEW SUPPORT STRUCTURE IAW BOEING DWG 147A5650 REV C.