One week after Spirit AeroSystems announced it has "substantial doubt" about its ability to continue as a going concern, Boeing is offering help.

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,

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

Boeing has agreed to give Spirit AeroSystems , the company that develops aircraft fuselages, a hefty financial boost. The US planemaker will provide up to $350 million in advance to support the production of products as the supplier grapples with a liquidity crisis.

The airframe manufacturer will get a new cash infusion from its major customer to ensure it can remain financially stable and maintain inventory, reduce operating expenses,

"We would not be surprised to see another such arrangement be announced," a prominent Wall Street aerospace sector analyst said.

Spirit AeroSystems and Boeing are close to reaching a funding agreement that would give a cash lifeline to the struggling Boeing supplier, an industry source familiar with the matter said.

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.