What was found
MAIN CABIN FLOOR SUPPORT STRUCTURE HAS CORROSION ON UPPER SURFACES AT 6EA FLOOR PANEL FASTENER LOCATIONS FROM APPROX STA 720-735, RBL 59-64 REMOVED CORROSION ON MAIN CABIN FLOOR SUPPORT STRUCTURE, STA 720 TO 735, RBL 59 TO 64 IAW B757 SRM 53-00-51-1A, FIG. 201, SHEET 4 AND FOUND TO BE OUT OF LIMITS. ORIGINAL MATERIAL THICKNESS IS .070, REMAINING THICKNESS IS .054, REMOVED .016. REPAIRED FLOOR SUPPORT STRUCTURE AREA, STA 720-735, RBL 59-64 IAW FEDEX EA F-5310-T0370234-P1, TITLE: FUSELAGE - MAINFRAME - FLOOR/GUTTER SUPPORT, STA 720, RBL 59, CORROSION, RELEASE DATE: AUG 23, 2022.