What was found
DURING BC-4 CHECK, GALVANIC CORROSION WAS FOUND ON LOWER SURFACE OF UPPER COUPLING (BEAM SPLICE) AT Y1292 RT, FORWARD OF FS 68. MAINTENANCE REMOVED CORRODED COUPLING AT Y1292 RT, FS 68; FABRICATED A NEW REPLACEMENT COUPLING; INSTALLED REPAIR PART IAW A319 SRM 51-72-11.