What was found
DURING CONFORMITY NOTED AFT CARGO DOOR, AFT CHANNEL SUPPORT DOOR TRACK CRACKED. (FWD OF THE TWO AFT CHANNELS) REMOVED AND REPLACED AFT CARGO DOOR, AFT CHANNEL SUPPORT (FWD OF THE TWO AFT CHANNELS) IAW CRJ 700 SRM 51-42-06, 51-42-21, 51-77-00. P/N ON/OFF MM670-35552-003. SDR SUBMITTED BEFORE AIRCRAFT FLEW REVENUE.