Group 1 - Boeing (BA) experienced a 1% decline in early trading on Tuesday [1][2] - The company has completed the acquisition of Spirit AeroSystems (SPR), integrating the production of major components and spare parts for the 737 and 787 internally [1][2] - Airbus (EPA: AIR) has taken over certain work packages for the A220 in Belfast, with the original Spirit business being split and processed [1][2]