B767 Undifferentiated or Other Model
Flight Crew Last 90 Days 150; Flight Crew Total 13000; Flight Crew Type 1800
Aircraft Equipment Problem Less Severe
General Declared Emergency
Aircraft
Low center system hydraulic quantity; ran checklist; all system operated normally. Declared an emergency; landed. Towed to gate.
I was on break in the crew rest seat when most of the events unfolded. Flight attendant woke me and told me my break was over; after checking my watch I saw we should be landing in about 45 minutes. When I entered the flight deck I saw and heard the Captain on SATCOM talking with [Maintenance]. The Relief First Officer briefed me on status of Center Hydraulic System and what checklists were being performed. I noticed the C HYD QTY EICAS MSG and saw the level to be about .48 and steady. The HYD QTY Non-Normal checklist had been completed to the deferred items part; the remainder of checklist would be completed on the approach descent check and on the actual approach. Captain completed call with [Maintenance]; and briefed us on that conversation. After a discussion on all systems affected by C HYD and options available the Captain decided we would declare emergency with [ATC] and land at [destination]. The Purser was briefed and PA was made to passengers. The Relief Officer and I reviewed HYD PRESS-C procedure in case all we lost the remaining fluid and systems affected; also checked landing distance abnormal or irregular configuration chart in case we lost the C system and confirmed [destination] had adequate length runways for that situation and briefed Captain. Emergency was declared and descent was initiated into [destination]. The remaining checklist items were completed; landing gear was extended early as well as flaps. QTY was never totally lost and at no time did we receive any HYD PRESS lights. Normal landing and roll out. Captain confirmed we had nose wheel steering. After clearing runway emergency personnel noticed leaking hydraulic fluid and the decision was made to shutdown engines and be towed to the gate.
B767 flight crew reported partial loss of hydraulic fluid in center system. They declared an emergency and a normal landing ensued.