Boeing, with a global order book and customers, airline companies, that buy more planes when times are good and travel demand is robust, is an obvious target for these concerns. Boeing has endured a difficult few years due to self-inflicted quality issues and the impact of the pandemic. It had been hoping for robust demand for new planes in the years to come to boost cash flows and help it to pay down some of the debt it took on during the crisis.
Boeing's total debt has ballooned by more than 400% since the start of 2018. If there is a prolonged slowdown, the company's campaign to fix its balance sheet and get airborne again will surely take longer than investors had hoped.
https://www.fool.com/investing/2022/09/16/why-boeing-stock-is-down-today/