The payments are intended to help address high levels of inventory and lower operational cash flows.

In April, Boeing provided a $425 million advance to support Spirit's liquidity. Spirit, Wichita's largest employer with around 12,800 full-time workers, previously disclosed it has spent all of that money, as well as the entirety of a $350 million bridge loan that was set up earlier this year.

Spirit Aerosystems (NYSE:SPR) rose 1.6% after the company confirmed that it entered into an advance payments pact with Boeing (BA). Boeing (BA) committed to pay as much as $350 million in the advanced payment pact,