What was found
DURING C-04 CHECK CORROSION WAS FOUND ON AFT CARGO DOOR SILL FORWARD SEALING CORNER BETWEEN FR 52A AND FR 52A+10. MAINTENANCE REMOVED AND REPLACED AFT CARGO DOOR SILL FORWARD SEALING CORNER IAW A320 SRM 51-42-11, FIG. 2-8, 12-13, AND 18.