What was found
DURING HEAVY MAINTENANCE: CORROSION ON LONGITUDINAL BEAM LOCATED BTW FR87 AND Y=290RH OF CABIN PAX FLOOR STRUCTURE AT CENTER FUSELAGE; REF: TOMX W/O 2552 N/R -00096 REPLACED PER EMB-190 SRM 51-12-01, SRM 51-10-03, SRM 51-75-16, SRM 51-43-03, SRM 51-41-01, AND SRM 51-42-01. (CONSIDERED AS A MAJOR REPAIR)