What was found
DURING HEAVY MAINTENANCE: CORROSION: CENTER RH LONGITUDINAL BEAM FR12-17 FWD FUSELAGE PAX CABIN FLOOR STRUCTURE (W1); REF TOMX W/O N249JB/2525/E190/BRIDGE NR00068: DEEMED OUT OF LIMITS IAW SRM 53-10-10/AD52. R & R RH FLOOR TRACK FWD FUSELAGE PAX CABIN IAW SRM 51-41-01, 51-41-02, 51-43-03, AND 51-43-04. (CONSIDERED A MAJOR REPAIR)