LOS ANGELES — A federal criminal complaint says a passenger on a flight this week from London to Los Angeles threatened to kill flight attendants and blow up the plane.The FBI says 20-year-old Kevin Lee Mosele of Kihei, Hawaii, was charged Tuesday with interfering with a flight crew. He could get 20 years in federal prison if convicted.According to the complaint, Mosele told investigator's he'd had several drinks in London before boarding the plane.It says he became agitated on the plane, spitting water on the crew and saying he'd kill them, then saying he was "going to set off a bomb."The FBI says he had to be restrained and was arrested when the plane landed Monday for a layover in Los Angeles. It had been headed to Hawaii.Mosele is free on a $10,000 bond. It's unclear whether he's obtained a lawyer.There was no public phone listing for him.