What was found
ON FLIGHT 4285 DURING THE CLIMB THE CREW RECEIVED A BLEED LEEK MESSAGE ON EICAS. THE CREW COMPLIED WITH AOM VOL 1 PROCEDURES. THEY CONTACTED DISPATCH AND ELECTED TO DIVERT TO RDU. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED O-RINGS AT JOINT 19. REMOVED AND REPLACED TUBE ASSEMBLY BELOW JOINT 19. PERFORMED AIR BLEED SYSTEM OPERATIONAL CHECK IAW EMB AMM 36-00-00. THE OPERATIONAL CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.