B777 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 185; Flight Crew Total 22000; Flight Crew Type 225
Situational Awareness
Aircraft Equipment Problem Less Severe
Flight Crew Became Reoriented; General Maintenance Action
Aircraft
Aircraft was on ILS approach to 7L VHHH in visual conditions.  First Officer was hand flying.  Configuration was 180 KTS and flaps 20 until 7 miles; then 160 KTS until 4 miles as per instructions of approach control.  Glideslope intercept was at 2000 AGL and gear and flaps were put into final configuration at about 1 dot above glideslope.  Aircraft was configured with gear down and landing flaps (Gear Down; Flaps 25).  At 1200 AGL got EICAS message 'DOORS'. Checked gear and saw it was down.  Went to checklist and completed items that were just info.  At this time got an EICAS and low pressure on the overhead for one of the center hydraulic pumps.  We were proceeding to that checklist as more lights associated with center hydraulic system came on.  Checked hydraulic synoptic and found center system had failed with an apparent leak.  We were now just above 500 feet.  Asked the three other crewmembers did they see any reason not to continue the approach and just land with the understanding that the steering system may have an issue.  All agreed the best course of action was to continue and land.  VHHH has a very elaborate missed approach with large hills surrounding the airfield.  Miss approach would had to of been accomplished with the gear down. One of the relief pilots brought up there may be an issue with spoilers.  Runway was dry and long.  First Officer landed and used reverse thrust in a symmetrical manner to bring aircraft to a stop.  At this time; as we were rolling out; notified tower we may have a steering issue where we may not be able to leave the runway due to hydraulic leak.  Tiller for steering became unresponsive as we slowed.  We were able to exit the runway by using the rudder pedals.  We stopped on a taxiway and shut down engines and completed all other checklist and shut down all center system hydraulic pumps.  There was no evacuation.  During the approach there was no time to declare an emergency.  On the taxiway airport authorities came and inspected the aircraft.  We waited for a tug and were towed to a hardstand.  Upon exiting the aircraft; Maintenance had already found that a steel braided flexible hydraulic line had burst in the nose wheel area.  Dispatch and the Flight Ops Manager were contacted and informed in a timely manner.
Flying into VHHH ILS 07L. Landing gear down; flaps to 25. About 1200 FT AGL; descending. First sign of problem landing Gear Door EICAS message. CA started running checklist then multiple other messages started coming up. Looked at synoptic and hydraulic fluid in center system was almost to 0. Within 30 seconds it was gone.  Someone asked about going around to sort out problem. We all agreed that was a bad idea since we were visual with gear and flaps in landing configuration. First Officer continued to fly to landing. We all discussed what was lost with center hydraulics. I monitored First Officer flying so as to make sure he was not distracted with discussion. He did a great job. Upon landing initially told tower stopping on runway because we didn't know if we could turn. Came to high speed turnoff A8 CA tried turning; successfully so taxied onto Taxiway A. On Taxiway A it seemed he lost steering capability; so set brakes and told ground we would be stopping there and waiting for tug to tow us in. Tower asked about needing emergency equipment. We said none was required. I talked to company Ops to advise of situation and request maintenance and tug. I also called Dispatch to advise of situation and to ask about effect on crew duty limit. He talked to Flight Ops Manager. All was good. I also talked to Purser; to advise of problem. Then made PA announcement to advise passengers we would require tow in to gate.While waiting we all discussed the possibility of go-around; and once again all agreed we made the best decision to land; because going around would have created a number of additional problems due to system failures. We then likely would have really been in an emergency situation.
B777 flight crew experiences the loss of the Center Hydraulic System on final approach with the aircraft fully configured for landing. The crew elects to continue the approach to landing and is then towed to a hard stand due to the loss of nosewheel steering.