A judge says the mechanic accused of trying to sabotage an American Airlines fight with 150 passengers on board before takeoff may sympathize with terrorists.

Bond was denied for Abdul-Majeed Marouf Ahmed Alani, 60, after he appeared in court in Wednesday.

A judge said Alani was a sympathizer of ISIS.

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According to prosecutors, Alani forwarded a terror video from his phone to another person, and experts are worrying about copycats.

Prosecutors also claim he wrote, "Allah we ask you to use all your might and power against non-Muslims."

Authorities say he tampered with a system that collects data like a plane's speed.

Alani was arrested back in July, and will remain in custody until trial. He’s charged with "willfully damaging, destroying, disabling or wrecking an aircraft." He’s not facing any terror-related charges, as of now.

The flight from Miami was aborted with no injuries reported.

He had worked for American Airlines since 1988, but has since been fired.

According to court documents, Alani says he didn't mean to hurt anyone, claiming he was upset with a contract dispute and hoped his tampering with the plane would lead to more overtime.