As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REMOVAL AT FLOOR PANEL SUPPORT IN FS280.00, CORROSION WAS FOUND ON RH CROSSBEAM OF FS 280. RH CROSSBEAM OF FS 280 WAS REPLACED PER CRJ900 SRM 51-42-21-001-001-A01, CRJ900 SRM 51-42-10-001-001-A01 AND CRJ900 SRM 51-42-06-001-001-A01