As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON STR 20L AT STATION 757. MAJOR REPAIR ACCOMPLISHED, CUT AND REMOVED STRINGER 20L FROM STA 750-780 DUE TO 100% MATERIAL LOSS FROM CORROSION. FABRICATED REPLACEMENT SECTION OF STR 20L IAW BOEING DRAWING 143 N3110 USING PN 193N3110-6. REPAIR SPLICE FABRICATED IAW B757 SRM USING P/N BAC1498-203. TREATED AND PRIMED PARTS IAW MM AND TOP COATED PER MM. INSTALLED PARTS PER SRM.