What was found
MAIN CARGO COMPARTMENT, FLOOR STRUCTURE BTWN STA 333.45-345 LBL 45.5-54.9 HAS CORROSION UNDER DRAIN PLATE. AFTER REMOVED SURFACE PROTECTION ON REPORTED MARK IN SHEAR WEB FOUND 03 SPOT OF CORROSION LOCATED BTW STA 333.45-345 LBL 45.5-54.9. REMOVED CORROSION IAW SRM 53-10-51-1A-2. PERFORMED CHECK SURFACE SMOOTH, FOUND 63 MICROINCHS 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.