What was found
(AIRCRAFT NOT GROUNDED) DISCREPANCY NOTED DURING AIRCRAFT HEAVY MX VISIT. MAJOR REPAIR, RT WING BOTTOM SKIN CORROSION AT FUEL PUMP FASTENER HOLES NR 133, 134, 135, 136, 138. BTW RIBS 1 & 2, REPAIRED IAW DWG R57258270 ISSUE C, PERMANENTLY REPAIRED IAW AIRBUS DOSSIER 81687227, SRM 57-21-11-283-059, REV 154, REPAIR CATEGORY B.