What was found
THE CREW REPORTED THAT WHILE CRUSING AT FL 370, THEY RECEIVED AN EICAS BLEED 1 LEAK MESSAGE. THEY NOTICED AN INTERMITTENT BLEED 1 LEAK ON THE BLEED VALVE. THE CREW COMPLIED WITH AOM, VOL 1 PROCEDURES AND THE MESSAGE RETURNED. THE CREW DECLARED AN EMERGENCY AND DIVERTED. THE ACFT LANDED WITHOUT INCIDENT. THE ACFT WAS REMOVED FROM SERVICE. R & R THE O-RINGS AT FITTING NR 1 IAW AMM 36-11-10. RAN BLEED AIR THROUGH APU IAW TASK 36-00-00-860-802-A. INSPECTED JOINT. NO FURTHER DEFECTS NOTED. OPC GOOD. R & R THE FAN AIR VALVE FILTER ON ENG 1 IAW AMM 36-11-03. THE OPS CHECK WAS GOOD. THE ACFT WAS RETURNED TO SERVICE.