As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TOP OF RBL9 BEAM IS CORRODED BETWEEN FS 661+62 AND FS 661+74. REMOVED FLOOR BEAM RBL9 BETWEEN FS661+16 TO FS 693 IAW CRJ-900 SRM 51-42-06-001-001-A01 AND SRM 51-42-21-001-001-A01 FLOOR BEAM P/N SH690-33403-7 MADE FROM B0549003BF EXTRUSION INSTALLED FLOOR BEAM RBL 9 BTWN FS 661+16 TO FS 693 IAW CRJ900 SRM 51-42-06-001-001-A01 & 51-42-21-001-001-A01