What was found
MAIN CABIN FLOOR FRAME UPPER CAP SHOWS EVIDENCE OF POSSIBLE CORROSION BL0 TO RBL20 BS 1060. REMOVED CORR ON FLOOR SUPPORT STA 1060 BL0 TO BL20R IAW B757 SRM 51-10-02 100% MAT. LOSS OUT OF LIMITS IAW B757 SRM 53-00-51 FIG 101. REMOVED SUPPORT IAW B757 SRM 51-040-02. FORMED, FABRICATED, LOCATED, DRILLED AND INSTALLED IAW B757 SRM 51-40-02, 51-40-05 AND FEDEX EA F-5310-0353717 P1 FUSELAGE - MAINFRAME - MAIN CARGO FLOOR SUPPORT STA 1060 CORRODED.