B777 Undifferentiated or Other Model
Flight Crew Last 90 Days 290; Flight Crew Total 15000; Flight Crew Type 6445
Training / Qualification; Workload
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Inflight Shutdown; Flight Crew Returned To Departure Airport; General Declared Emergency
Aircraft
I was the Relief Pilot on [the] flight. The preflight; taxi out; and takeoff were uneventful. I went on first break. About 20 minutes into my break; I was woken up by the galley Flight Attendant; and was told I was needed in the cockpit; and we were returning to [departure airport.] I returned to the cockpit with the Purser; who wanted to be briefed by the Captain on what to expect. On returning to the cockpit; I found the aircraft at FL350. The First Officer was starting to run the Low Oil Pressure Checklist on the Left engine. He ran that checklist; [and] then I helped him with the Drift Down checklist. During that time; I noted the Left engine had zero oil quantity; and wind milling oil pressure of about 7 psi. The Captain obtained clearance to descend and return direct [departure airport.] I briefed the Purser initially; as the Captain was still busy; [and] then he finished filling her in on our situation. We started dumping fuel per that checklist. The Captain asked me to check the diversion guide in the FOM for anything we may have missed. We all discussed the approach and landing; and cleared up a few minor confusions about the checklist. The Captain made the initial PA to the cabin; and I followed that up with a few more; as the situation warranted. We finished dumping fuel; and started the Fuel Imbalance checklist. Set up for the Visual Approach. All the normal and irregular checklists and procedures were finished (except for the fuel crossfeed; which the Captain elected to continue to landing). We made a normal single engine landing; and taxied clear of the runway; and stopped crossfeeding. After the crash trucks checked the aircraft; we taxied to gate.
A B777 left engine LOW OIL PRESS alerted at cruise shortly after takeoff; so an emergency was declared; fuel dump begun; the QRH completed and the flight returned to the departure airport.