Japanese probe identifies cause of 787 Dreamliner fuel leak problems

Japanese regulators have identified the reasons for the fuel leaks and other problems that occurred on Japan Airlines' (JAL) 787 Dreamliner jets in January but are still investigating battery problems that caused worldwide grounding of the aircraft.

Japan's Transport Ministry concluded that the fuel leak which occured on 9 January, prior to the takeoff of JAL 787 in Boston, was due to a foreign material 1.5mm big that was stuck to fuel valves and caused them to remain partially open.

In addition, a fuel leak on the same aircraft at Tokyo's Narita airport, on 13 January, was caused by an improperly applied electrical-insulating coating material.

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