As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STGR 21R IS CORRODE FROM FS 333 TO FS 364 REMOVED STRINGER 21R BETWEEN FS 333 TO 379 IAW CRJ 900 SRM 51-42-06-001-001-A01. INSTALLED STGR 21R PN: SH670-31383-1S FROM FS 333 TO FS 379 THROUGH SKIN IAW CRJ900 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01