What was found
DURING C-04 CHECK CORROSION WAS FOUND IN 9 PLACES ON AFT CARGO DOOR SILL WEB BETWEEN FR 52A AND FR 54. MAINTENANCE REMOVED AFT CARGO DOOR SILL WEB FROM FR 52A TO FR 54; FABRICATED A NEW REPLACEMENT WEB SILL; INSTALLED REPAIR PART IAW A320 SRM 51-42-11, FIG. 2-8, 12-13, & 18.