As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEN ITEM: 19-5330-1-2802 (B757-53-3-0480) CORROSION ON THE CABIN FLOOR PANEL SUPPORT FROM STA.1640 TO STA.1660, BL0.#3661 REF AMES NR 172653-0100-0052 REPLACED FLOOR SUPPORT TAG# 3900937 BY LOCATED AND DRILLED IAW B 757-200 SRM 51-40-00 FLOOR SUPPORT INSTALLATION WILL BE ACCOMPLI SHED ON CARD #172653-0100-0051 STEP 5