As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
KUL - NRC: 813657 - HEAVY EXFOLIATION CORROSION FOUND AT FLOOR CHANNEL T-ANGLE OF FORWARD LAVATORY AT BS 340 BETWEEN RBL 30 AND RBL 40. CORROSION FOUND IS BEYOND LIMITS LESS 50 PERCENT FLANGE THICKNESS REMAINING. REPLACED FLOOR SUPPORT OF FORWARD LAVATORY IAW SRM 51-10-2. AREA IS 10 INCHES BY 2 INCHES.