As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FRAME 645.00 BTW STGR 18L AND STGR 19L AT AT CABIN FLOOR STRUCTURE. ON FRAME 645.00 BTW STGR 18L AND STGR 19L AT AT CABIN FLOOR STRUCTURE WAS REMOVED PER CRJ-900 SRM 51-21-06-001-001-A01 AND EVALUATED WITHIN LIMITS PER CRJ-900 SRM 53-31-06-101-002-A05.