Boeing and All Nippon Airways are investigating the causes of a hydraulic system pump issue that forced the crew of a 787 flight from Okayama to Tokyo to shut down one of the aircraft’s Rolls-Royce Trent 1000 engines before takeoff. The failure is thought to have occurred in one of the aircraft’s four electric motor pumps (EMPs) that drive the hydraulic pumps on a demand basis. The Parker-made pumps are part of the EMPs, which are assembled and integrated by Hamilton Sundstrand along with the motor controller, which is part of the 787’s electrical power generation and start system.