Core Viewpoint - United Airlines' A350 order faces new uncertainty due to a dispute with engine supplier Rolls-Royce, raising questions about the delivery timeline and the future of the order [1]. Group 1: Order Background - The A350 order dates back to 2009 and has undergone multiple changes and deferrals over the years [1]. - United Airlines has indicated that the delivery timeline for 45 A350 jets has been dropped, with no expected arrival date provided [1]. Group 2: Engine Contract Dispute - United Airlines claims that Rolls-Royce breached their long-term contract, which includes a $175 million upfront payment made in 2017 [1]. - Rolls-Royce denies any breach of contract and asserts that it has complied with its obligations [1]. - Both companies are currently in a dispute over financial claims, with each party alleging that the other owes them money [1]. Group 3: Implications for Stakeholders - The dispute between United Airlines and Rolls-Royce could have implications for Airbus, as the A350 order involves complex relationships among the airline, the aircraft manufacturer, and the engine supplier [1]. - United Airlines is considering the potential impact of the dispute on its long-term widebody replacement needs, particularly regarding older Boeing 767s and 777s [1]. - Speculation exists that United may cancel the A350 order or convert it to other Airbus aircraft, such as the A321neo family [1].