The pilot told the control tower that he'd run into technical trouble.

该飞行员告诉航空站说他遇到了技术问题。

《柯林斯英汉双解大词典》

Landing: the pilot receives landing clearance from the Local Controller in the airport's control tower to landing on a designated runway.

落地：飞行员从机场塔台的进场管制员处得到落地许可，操作飞机降落在预订跑道上。

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Takeoff: the pilot receives permission from Local Control (the Tower) to takeoff. The aircraft powers up and begins its takeoff roll.

起飞：飞行员从本场管制(塔台)获得起飞许可，飞机加大油门开始起飞滑跑。

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It rolled and crashed vertically into the ground before the tower could alert the pilot, Plagens said.

CNN: One killed in California plane crash

"Hey, that Japan Air may know it but they have fuel spewing out the leftward wing quite a bit, " the pilot of another plane told the control tower, which radioed the JAL crew and halted takeoff.

CNN: Airline: Dreamliner fuel leak due to an open valve