What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK 4 AREAS OF GALVANIC CORROSION WERE FOUND ON FLOORBEAM 279MM AFT OF FR 67 AT Y1219, 431MM AFT OF FR 67 AT Y1143, 330MM AFT OF FR 67 AT Y1143, AND 220MM AFT OF FR 66 AT Y1292, Z240. MAINTENANCE REMOVED AND REPLACED FLOORBEAM FROM BS 31030 TO BS 33200, Y1143 TO Y1292, Z240 IAW A319 SRM 51-42-11 PG 6-7.