MD-11
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Lost hydraulic system 2 on takeoff. All fluid leaked out. Ran checklist [and] returned for landing. Taxied to gate under own power. Hydraulic system 2 right pump was MELed. New engine.
We had maintenance delays on preflight and pushback. Engine #2 had previously been replaced. Number 2 hydraulic pumps or system had MEL. As Captain pushed throttles up I checked hydraulic system one last time. All normal. About 70 knots lights came on then extinguished. At 400 ft AGL system warnings came on. Both pilots flew as I went to relief pilot duties. Number 2 hydraulic system failed. Number 2 system had no hydraulic fluid at all. Ran HYD 2 fail checklist. First Officer landed uneventfully. This was going to be a long fix. Took 16 hrs before ready to fly again.
MD-11 flight crew reported returning to departure airport after experiencing loss of Number 2 hydraulic system.