What was found
DURING C4 CHECK, DISCOVERED CORROSION ON SUPPORT, LOCATED AT FR 70 - 4, -Y 1180, UNDER STRINGER 23R. MAINTENANCE REMOVED CORRODED SUPPORT AT FR 70 - 4, -Y1180, UNDER STRINGER 23R. PREPARED NEW SUPPORT FOR INSTALLATION IAW AIRBUS MM 51-25-00. INSTALLED REPAIR PARTS AT FR 70 - 4" AND -Y 1180, UNDER STRINGER 23R IAW AIRBUS MM 51-72-11 PAGES 1 AND 2.