B777 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 255; Flight Crew Total 23900; Flight Crew Type 7292.77
Aircraft Equipment Problem Less Severe
Flight Crew Returned To Departure Airport
Aircraft
Going through Release #1 in weather room noticed that engine 2 had been replaced and had not flown prior to our flight. Saw no indication of an ETOPS Verification flight requirement in flight plan. Captain called dispatch and inquired if the aircraft had flown and whether or not any action was required. Dispatch consulted maintenance and amended the release to #2 requiring an ETOPS verification flight.Printed flight plan #2 and proceeded to aircraft.Engines both started all indications normal; taxied out to runway; International Relief Officer (IRO) noted the oil quantities at 24 and 23 qts at takeoff. Busy departure; noticed nothing abnormal. While recording times at ZZZZZ intersection noted oil quantity #2 engine at 15 qts. As flight continued oil qty continued to decrease at approximately 1 quart/hr. We sent multiple messages and satellite calls to Dispatch and maintenance about low quantity.At 30 minutes prior to ETOPS entry point oil was at 13 quarts with 10 hours to go in flight which would give us a projected 3 quarts left at landing. We elected not to send an ETOPS verification message and instead return.Turned back; dumped fuel to arrive below max landing weight.(Details sent to dispatch.)Landed with 9 qts indicated after 6:45 [hours] airborne. After engine shutdown qty bounced back up to 15 qts.
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B777 flight crew reported excessive oil consumption from a newly replaced engine. Crew returned to departure airport.