What was found
WHILE CLIMBING THROUGH 5,000FT THE CREW RECEIVED A PACK 1 VALVE CLOSED AND BLEED 1 VALVE CLOSED MESSAGE WITH PACK 2 ON MEL. THE CREW ATTEMPTED TO RESET SEVERAL TIMES BUT THE PROBLEM PERSISTED. THE AIRCRAFT THEN ENTERED ICING AND THEY RECEIVED A WING ANTI-ICE FAIL MESSAGE. THE AIRCRAFT RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE FLEXIBLE DUCT FROM RAM AIR VALE TO THE HEAT EXCHANGER FOR THE NR 1 PACK SPLIT AND ON THE NR 2 PACK A DISCONNECTED DUCT COMING FROM THE PACK 2 HEAT EXCHANGER. THE DISCONNECTED DUCT ON PACK 2 WAS RE-ATTACHED AND PACK 1 WAS PLACED ON MEL. IN CMH ON 10/14/2010 THE PACK 1 MEL WAS CLEARED WITH THE REPLACEMENT OF THE FLEXIBLE DUCT FROM THE RAM AIR VALVE TO THE HEAT EXCHANGER AND THE DUAL TEMP CONTROL VALVE DUCT COUPLING.