As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RT FLOOR SILL BETWEEN FS 280 AND FS 319.7 IS CORRODED IN MULTIPLE LOCATIONS, MARKED WITH BLACK GREASE PENCIL. C-CHECK RO 9/20/2020. REPLACED FLOOR SILL SECTION FROM FS 280.00 TO FS 319.7 WITH NEW PART P/N-SH670-32172-7, REF CRJ-700 SRM & DRAWING. LEAK CHECK GOOD. COMPLIED WITH TASK CARD.