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 RT LONGITUDINAL FLOORBEAM BETWEEN FR 85 AND FR 90. MX REPLACED THE RT UPPER SHEET FLOORBEAM AND PANEL SUPPORT P/N 170-86101-001, P/N 170-86150-001, P/N 170-65669-004 IAW EMB 170 SRM. A/C REMAINS IN CMH FOR HEAVY CHECK COMPLETION.