What was found
ON FLIGHT 3209 THE CREW REPORTED THAT AFTER COMPLETING THE AFTER TAKEOFF CHECK LIST RECEIVED A NR 2 BLEED LEAK WARNING MESSAGE ON CLIMBOUT THRU 4000 FEET. THE CREW PERFORMED AN EPC/AOM CHECKLIST - LEAK INDICATION EXTINGUISHED AFTER APPROX 60 SECONDS OF SHUTTING BLEED NR 2 OFF. THE CREW DECLARED AN EMERGENCY AND RETURNED TO ORD WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. TIGHTENED CLAMP ON NR 2 ENGINE BLEED VALVE IN RIGHT PYLON REF AMM 36-11-05 AND REPLACED CLAMPS AT RIGHT TUBE FROM DUAL TEMP VALVE TO HEAT EXCHANGER REF 21-60-01. PERFORMED OPERATIONAL CHECKS OF THE BLEED AIR AND PACKS IAW AMM 36-00-00 AND 21-51-00 NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.