What was found
AFT CARGO COMPARTMENT BETWEEN STA 787+7' AND 847 UNDER CENTER LOWER DOOR TRESHOLD PLATE ;TRESHOLD WEB IS CORRODED IN SEVERAL AREAS BETWEEN RBL 20 AND RBL 28 WL 155.3 AS MARKED / REMOVED CORROSION AFT CARGO COMPARTMENT THRESHOLD WEB STA 787+7 TO 847 IAW SRM 51-10-07-0G-0. FOUND TO BE 100% MATERIAL LOSS OUT OF LIMITS IAW SRM 53-60-15-1A-1. REMOVED AND REPLACED WEB IAW SRM 51-40-02-0G-0 AND BOEING DWG 146A812 REV A ATAG IK0572 P/N A46A8123-25