As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR FWD DOOR TRACK IS CHAFED IN TWO LOCATIONS. FIRST LOCATION CHAFE IS APPROX 0.375 LONG, 0.375 WIDE AND 0.035 DEEP, SECOND LOCATION IS 0.250 LONG, 0.250 WIDE AND 0.035 DEEP. REMOVED AND REPLACED AFT CARGO FWD DOOR TRACK P/N CC670-38725-5 IAW CRJ-900 AMM 52-31-00-000-802-A01, AMM 52-31-00-400-802-A01