As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FLOOR PANEL 27 METAL THRU PLATE 2 EACH FOR LAV WATER LINES HAS CORROSION ON CABIN FLOOR PANEL 27, REMOVED 2EA. LAV WATER LINE DOUBLER IAW DC9/MD-80 SRM 51-70-02 PARA 6 PAGE 11. FABBED 2EA DOUBLER PLATE PER FSI DWG 94RS481265. BONDED 2EA DOUBLER PLATE ON FLOOR PANEL 27 IAW FOR ENGINEERING SUPPORT 87359480001 AND PS900-7-1- NR 03.