B757-200
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Time Pressure
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Landed in Emergency Condition; General Declared Emergency; General Maintenance Action
Aircraft
On random North Atlantic track right engine oil quantity began to decrease to zero. After 5 minutes the right engine oil pressure began dropping from normal. We declared an emergency; with ATC; and then flew a 15 miles offset; left of track; then began a descent and proceeded to our enroute alternate ETOPS diversion airport. We retarded the right engine to idle and left the right engine in idle for approximately one hour and forty minutes until we landed and shut the engine off. We landed using single engine procedures and the approach and landing was uneventful. Engine oil pressure remained stable in lower green band; 23-24; and oil temperature remained in the green band through out the diversion flight.Right Engine had an oil leak and we needed to land as soon as possible.
A B757-200 began loosing oil at FL350 on an Atlantic Track and diverted to an ETOPS alternated with the engine running at idle and oil pressure in lower green band.