As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION OVER WEB FLOOR STRUCTURE 2 EACH Y=330 BTW FR84/FR86; (REF TOMX W/O 1556 N/R 00230) WEB FLOOR STRUCTURE WAS REPLACED PER EMB-190 SRM 51-43-03 ITEM 5 FIG 1 AND ITEM 6 FIG 2 AND SRM 51-41-01 ITEM 4 FIG 1 AND ITEM 6 FIG 2.