What was found
IAD/EWR---CO3411, CREW REPORTED NR 1 ENGINE BLEED LEAK, AND BURNING SMELL NOTED IN FLIGHT. AIRCRAFT RAN AND INSPECTED AND MAINTENANCE FERRIED TO EWR. EWR MAINTENANCE TIGHTENED DUCT CLAMP, RAN ENGINE FOR 30 MINUTES, NO FAULT NOTED AT THIS TIME IAW ATR42 MM 36-22-00. AIRCRAFT RETURNED TO SERVICE.