As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING REPAIR TO STA 986 FLOOR STRUCTURE FOUND FLOOR SUPPORT @ STA 967-STA 986 RBL 16 TO HAVE CORROSION. P/N 140A9872-10. GROUNDED - YES. REMOVED AND REPLACED (INSTALLED) NEW FLOOR SUPPORT AT STA 967-986 RBL 16 I.A.W B737-800 SRM 51-40-02 AND PER BAC DWG 140A9870 REV-. ORIGINAL MAT THICKNESS .080, MAT REMOVED .080, MAT REMAINING .000. OUT OF LIMITS DUE TO NO LIMITS GIVEN. 100% MATERIAL LOSS.