What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK FILIFORM CORROSION WAS FOUND ON UPPER SURFACE OF WEB BETWEEN FR 69 AND FR 70, AND AFT OF BEAM Y-1292. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED SHEAR PLATE WEB BETWEEN FR 69 AND FR 70, AFT OF BEAM Y-1292, BETWEEN STR 23 AND STR 24 RT; FABRICATED A NEW REPLACEMENT SHEAR PLATE; INSTALLED REPAIR PART IAW A320 SRM 53-00-14, PG 101-102, SRM 51-44-11, PG 16, 19-20, FIG 2, AND SRM 51-42-11, PG 8-12, 21, 22, FIG 2, 3, & 8.