What was found
ON FLIGHT 3214 IN CRUISE FLIGHT THE CREW REPORTED THEY GOT E1 BLEED LEAK EICAS MESSAGE FOLLOWED AOM E1 BLEED SHUT OFF MESSAGE CLEARED AND EMERGENCY DECLARED AND LANDED IN MAF. THE AIRCRAFT LANDED WITHOUT INCIDENT. NO OTHER PROBLEMS NOTED. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED O-RINGS AT JOINTS 1, 9, 21 & 23 ON NR 1 BLEED DUCT AS PER EMB MM 36-11-10. LEAK CHECK FOUND TO BE GOOD AT THIS TIME. THE AIRCRAFT WAS RETURNED TO SERVICE.