What was found
DURING C-04 CHECK, GALVANIC CORROSION WAS FOUND ON UPPER AND LOWER SURFACE OF RT AFT SHEAR PLATE BETWEEN FS 69 AND FS 70, OUTBOARD OF BEAM Y1292. MAINTENANCE REMOVED CORRODED RT AFT SHEAR PLATE FROM FS 69 TO FS 70, AT Y1292; FABRICATED A NEW REPLACEMENT SHEAR PLATE; INSTALLED REPAIR PART IAW A320 SRM 51-42-11, FIG 2, 3, & 11.