New York (CNN Business) Boeing's stock has slid more than 8% in the past week as investors grow increasingly concerned that it could be held liable for the deadly Lion Air crash last month.

The first lawsuit against Boeing related to the crash was filed Thursday. The parents of one passenger sued the company, claiming that the downed plane, a 737 MAX 8, had an unsafe design.

Lion Air flight 610 crashed on October 29 into the sea near Jakarta, Indonesia, soon after taking off killing all 189 on board.

The suit alleges Boeing failed to communicate a new safety feature that hadn't existed in previous 737s. Lion Air's operational director accused Boeing of withholding information from pilots about a safety feature that automatically lowers the airplane's nose to prevent or exit a stall.

Justin Green, an attorney for Kreindler & Kreindler and a CNN aviation analyst, said he believes that Boeing might "very well" be held liable.

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