As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON ANGLES (2 EAS, ONE PER SIDE) BEHIND ACCESS PANELS; 542AZ AND 642AZ AT LH/RH MLG AREA. ANGLES (2 EAS, ONE PER SIDE) BEHIND ACCESS PANELS; 542AZ AND 642AZ AT LH/RH MLG AREA WERE REPLACED PER CRJ-900 SRM 51-42-21-001-001-A01"