Airbus CEO Says Uncertain Outlook For Spirit AeroSystems Industrial Commitments Contributed To Decision To Cut Airbus Output Targets; Declines Comment On Timing Of Impending Agreement To Acquire Spirit AeroSystems Assets Related To A350 And A220; Says Supply Situation For Engines For A320 Family From Both Suppliers Has Deteriorated, Airbus Would Have Had To Start Building Jets Without Engines By End-Month Without Adjusting Guidance; Engine Supply Situation Has Significantly Degraded Over The Last Months