What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK GALVANIC CORROSION WAS FOUND AT FASTENER HOLES OF FLOOR SUPPORT SHEAR PLATE FR 69+6, Y-45. MAINTENANCE REMOVED FLOOR SUPPORT SHEAR PLATE FROM FR 69 TO FR 70; FABRICATED A NEW REPLACEMENT SHEAR PLATE; INSTALLED REPAIR PART IAW A320 SRM 51-42-11, PG 8-12, & 21-22, FIG 2, 3, & 8 , AND SRM 51-46-11, PG 1-2, FIG 1.