What was found
INSPECTION TYPE:C, BULK CARGO COMPT STA 1960 TO 2020, LBL 53.45 FLOOR PANEL SUPPORT UPPER & LOWER SURFACE FOUND SEVERAL AREA CORRODED. REPAIR IAW HX RS R53-65-37290 REV A & EO B747-5320-45867-A. ORG MATL BAC1520-1892-7075T6511 & THICKNESS 0.063", CORRODED BLENDED AREA DEPTH 0.045", MINOR REPAIR WITH MATL BAC1520-1892-7075T6511 AS REPAIR INTERCOSTAL SECTION AND 7075-0-0080" AS REPAIR ANGLES. (HEAT TREAT TO T6 CONDITION AFTER FORMING)