As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT PRESSURE FLOOR SILL IS CORRODED AT (1) LOCATION ON THE FLOOR SKIN BETWEEN FS 449.85 AND FS 473.15. C-CHECK RO 11/11/2020. REMOVED LT PRESSURE FLOOR SILL CORROSION AT (1) LOCATION ON THE FLOOR SKIN BETWEEN FS 449.85 AND FS 473.15, IAW BOMBARDIER REO. WEIGHT AND BALANCE NOT AFFECTED. M-337 AND TASK CARD ATTACHED.