As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN FLOOR SUPPORT STA 947 TO STA 967 LBL 16" SMALL AREA OF CORROSION ON TOP SIDE, MARKED. GROUNDED - YES. REMOVED CORROSION FROM AFT CABIN FLOOR SUPPORT BETWEEN STA 947 AND STA 967 AND FLOOR SUPPORT WAS FOUND TO BE WITHIN LIMITS IAW B737-700 SRM 53-70-51-1A-1.W= 1.5" O= .080" R= .073" L= 3.0" D= .007".