As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL BTW FS=310 / FS=349 AND STGR 21LH AT INTERNAL SURROUND STRUCTURE OF THE PASSENGER DOOR, BELOW THE FLOOR. INTERCOSTAL ON FS 310.00 TO FS 333.00 STGR 21LH, STGR 21LH WAS REPLACED PER CRJ900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01 AND CORROSION ON INTERCOSTAL FS=333 TO FS=349 AND STGR 21LH WAS REMOVED PER CRJ900 SRM 51-21-06-001-001-A01 AND EVALUATED WITHIN LIMITS PER CRJ-900 SRM 53-00-00-101-001-A01