Spirit AeroSystems said on Tuesday it would receive up to $350 million in advance payments from its largest customer Boeing and up to $107 million from Airbus , giving the struggling supplier a lifeline as it burns cash after four consecutive years of losses.

Boeing has agreed to pay Spirit AeroSystems up to $350 million in advance to keep producing products for it as the fuselage supplier works through a liquidity crunch. The jet maker said Tuesday that the advance payments are intended to help Spirit address high levels of inventory and lower operational cash flows.

Spirit AeroSystems said on Tuesday that Boeing will pay a total of up to $350 million in advance payments to the firm, providing the struggling supplier a lifeline as it continues to burn cash after four consecutive years of losses.

The Federal Aviation Administration said on Tuesday it will bar U.S. airlines from operating in Haiti for 30 days after three commercial jetliners were struck by gunfire on Monday. The FBI said separately it was investigating the incidents and working with law enforcement partners.

A Spirit Airlines plane was struck by bullets as it was landing in Haiti’s capital, prompting authorities to close down the main airport of a nation caught in a raging gang war.The flight from Fort Lauderdale was diverted to the Dominican Republic on Monday and one flight attendant reported “minor injuries”,