As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE A/C WAS IN FOR HEAVY CHECK FOUND RT AFT FLOORBEAM FROM FR86-90 HAS CORROSION. MX REMOVED AND REPLACED RT AFT FLOOR BEAM FROM FR 86-90 IAW EMB 170 SRM 51-40-02, 51-40-01,51-43-02. FCS NOT AFFECTED. P/N 170-65669-004 A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.