What was found
MAIN CARGO COMPARTMENT, FLOOR STRUCTURE BTWN STA 333.45-337.7 UNDER PANEL 221XAF HAS CORROSION . AFTER REMOVED SURFACE PROTECTION ON REPORTED MARK IN SHEAR WEB FOUND 05 SPOT OF CORROSION LOCATED BTW STA 324 TO STA 377.70 AND BTW BL0 TO LBL24.75. AFTER REMOVED CORROSION IAW B757 SRM 53-10-51-1A-2 AD2. PERFORMED CHECK SURFACE SMOOTH, FOUND 63 MICRO INCHS RA IN BLEND OUT AREAS. IAW B757 SRM 53-10-51-1A-2 AD2 STEP 2E. T90482. AND APPLIED SURFACE PROTECTION IAW B757 SRM 51-20-01 AND AMM 51-21-15-370-801.