As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON STRINGER 18R AND STRINGER 19R BTW STA=453-437 AT PASSENGER CABIN. STRINGER 18R AND STRINGER 19R BTW STA= 349 TO 469 AT PASSENGER CABIN WERE REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01 PARAGRAPH 6.C. AND CRJ-900 SRM 51-42-20-001-001-A01 PARAGRAPH 6.C.