What was found
(AIRCRAFT NOT GROUNDED) (DISCREPANCY DISCOVERED DURING AIRCRAFT HEAVY MX VISIT) NRC 5000-0013: 33284-23 LH WING TRAILING EDGE, RIBLET E AT RIB 13 CORRODED / AT LH WING TRAILING EDGE , RIBLET E AT RIB 13 REPLACED AS PER AIRBUS DOSSIER 81427484 AND REPAIR DRAWING R575-40263#B. REPAIR IS CATEGORY A AS PER AIRBUS RDAF/81427484/006/2024#A. REPAIR IS MAJOR DUE TO PSE ITEM. NO FURTHER ACTION REQUIRED. SEE AWS FOR DETAILS AND NDT REPORT MWO 58564-10. RIBLET PN: D5755907120039 PO:2076190 REF AAY ERO: R5751-0052 R.00"