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 LEVEL 2 CORROSION ON THE RT LOWER CF2 TRACK BEAM. MX REMOVED AND REPLACED BEAM P/N 170-99451-003 IAW EMB 170 SRM 51-40-02, 51-41-02, 51-23-06. NO FCS EFFECTED. A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.