As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR SURROUND STRUCTURE, BACK-UP SILL AT STGR 21L IS CORRODED BETWEEN FS 310 TO FS 333. C-CHECK RO 1/17/2021. REMOVED AND REPLACED CORRODED BACK UP SILL WITH NEW PART (P/N SH670-31822-1) ON STGR 21L BETWEEN FS 310.00 AND FS 333.00 USING ALL NEW FASTENERS, REF BOMBARDIER DWG SH670-31810 REV AE AND CRJ700 SRM'S 51-42-06-001-001 A01 AND 51-42-21-001-001 A01. COMPLIED WITH SKYCARD 51-900-1002-SKY. LEAK CHECK GOOD.