What was found
ORD - FLT 1361 - EN ROUTE EWR-ORD - WHILE NR 1 PACK WAS OFF, HAD PACK NR 2 FAULT. CREW REPORTED LOSS OF BOTH AIR CONDITIONING PACKS. CAPTAIN DECLARED AN EMERGENCY AND AN EMERGENCY DESCENT WAS INITIATED TO 10,000. PACK 2 WAS PUT ON LINE AGAIN AT 10,000. WE CLIMB UP TO 20,000 FT TO FINISH THE FLIGHT AND THE NR 2 PACK WORKED FOR THE REMAINDER OF THE FLIGHT. LANDED ORD WITHOUT INCIDENT. REPLACED DUCT ASSEMBLY OPERATIONS AND LEAK CHECK OK. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)