As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*** WHILE AIRCRAFT WAS IN FOR HEAVY CHECK *** MAINTENANCE REPORTED LEVEL 2 CORROSION ON THE FLOOR BEAM CAP AT FR84-FR85, LBL10. MAINTENANCE REMOVED AND REPLACED THE FLOOR BEAM CAP AT FR84-FR85, LBL10 IAW E170 SRM 51-40-08 & 51-40-02. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.