What was found
AFT WING TO BODY FAIRING AFT C-CHANNEL CRACKED. CORRECTIVE ACTION: REMOVED AND REPLACED AFT C-CHANNEL (P/N:670-39251-1) IAW CRJ700 SRM 51-41, 51-40-11, 51-42-06, 51-25-21, 51-25-06, 51-21-11, AMM 53-82-83, AND PERFORMED BOMBARDIER MOD SUM IS670538200021 REV C.