As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION IN MULTIPLE AREAS ON FLOOR SUPPORT BS 1681 TO BS 1640 LBL 57. MAJOR REPAIR ACCOMPLISHED. CORROSION FOUND TO BE OUT OF LIMITS AT BS 1660-BS 1661 LBL 57. ORIGINAL MATERIAL .071, 100% MATERIAL LOSS IAW BOEING DRAWING 146N5246. REMOVED AND REPLACED FLOOR SUPPORT P/N 146N5246-5, PO 418821.2 AT BS 1640-BS 1681 LBL 57 IAW B757-200 SRM 51-40-02 PAR 7 FIG 12.