As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON MAIN CABIN FLOOR SUPPORT UPPER SURFACE BETWEEN STA 720-740 RBL-62. REMOVED MAIN CABIN FLOOR SUPPORT BETWEEN STA 720-740 RBL-62 AND INSTALLED NEW FLOOR SUPPORT PN 143N5522-2 BATCH 0003237235 POS G1890018 IAW SRM 51-40-02 PG 2 AND SRM 51-40-02 PG 7 AD DRAWING 143N5522. ORIGINAL MAT THICKNESS .056" BLEND OUT DIMENSIONS ON FLOOR SUPPORT L=8" W=2" D=.025" OUT OF LIMITS IAW SRM 53-00-51 FIG 101 DETIAL III.