As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND BRACKET UNDER FLOOR PANEL 251HLF FRAME 86 BROKEN. MAINTENANCE REMOVED AND REPLACED THE FLOOR PANEL 251HLF BRACKET IAW EMB 175 SRM 51-41-01, AND 51-40-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.