What was found
CORROSION IN THE FWD CARGO FLOOR SUPPORT INTERCOSTAL LOWER FLANGE, APPROX BS.738 RBL 7.5 DOT 129-047. REMOVED CORROSION ON INTERCOASTAL, APPROX STA 738 RBL 7.5 IAW B757 SRM 51-10-02-0G. UPON EVAL FOUND INTERCOASTAL TO BE WRONG MATERIAL, IAW BOEING DWG 143N5367 REV F. REMOVED, FABRICATED, AND INSTALLED NEW INTERCOASTAL IAW B757 SRM 51-40-02-0G, 51-40-05-0G AND BOEING DWG 143N5367 REV A, REV F AND 143N5362 REV A.