Core Viewpoint - United Airlines is facing significant operational disruptions due to technical issues, leading to flight cancellations and delays, which have negatively impacted its stock performance compared to major indices [1][2]. Group 1: United Airlines Operational Issues - United Airlines announced a halt to its mainline flights at several major airports in the U.S. due to technical problems, with expectations of further delays [2]. - As of the latest update, 827 flights have been delayed and 23 flights canceled, affecting key hubs such as Denver, Houston, Newark, San Francisco, and Chicago [2]. - A recent incident involved a United Airlines Boeing 787 experiencing engine failure shortly after takeoff, prompting an emergency landing with 219 passengers and 11 crew members onboard [3]. Group 2: Stock Performance and Market Context - Year-to-date, United Airlines' stock has declined over 8%, underperforming against the Dow Jones, Nasdaq, and S&P 500, which have seen increases of 3.88%, nearly 10%, and close to 8% respectively [1]. - The stock initially rose by 1.22% but quickly turned to a decline of 0.84% during after-hours trading following the announcement of the technical issues [1]. Group 3: Boeing's Challenges - Boeing's defense sector is facing potential shutdowns due to a strike by assembly workers, impacting the production of military aircraft [4]. - The strike is primarily due to failed negotiations over worker compensation, affecting the assembly of F-15 and F/A-18 fighter jets, among others [5]. - Boeing reported a revenue improvement in Q2, with earnings of $22.75 billion, a 35% increase year-over-year, although it still incurred a loss of $612 million [5][6].

And we are following some breaking news right now. United Airlines has apparently requested a ground stop at major airports tonight. We're talking Chicago, Newark, Houston, San Francisco.We have NBC News senior producer Jay Blackman on the phone. Jay, what are you hearing about why this ground stop was ordered. >> So Gotti, this is affecting all of United's mainline flights.So not their regional characters, not their regional flights. It's uh an issue with a computer system. They're saying it's due to a tec ...

（文章来源：央视新闻） 当地时间8月6日，美国联邦航空管理局对美国联合航空公司（美联航）在多个机场的航班下达地面停飞 令。 美联航表示，正紧急处理一起技术故障，尽快恢复航班运行。 ...

【#出票又取消乘客称疑遭虚假出票# 售票平台：系航司取消 已联系乘客退款】#同程旅行回应乘客出行 前座位被取消#8月5日，有网民发文称在同程旅行购买机票后，出行前座位被取消。同程旅行工作人员 表示 "虚假出票"不实，原订单系因境外信用卡风控被航司取消，已于7月20日为张先生出具新客票，但 张先生未选择出行。@新京报 记者从美国联合航空公司处核实到，原订单确为航司因信用卡风险原因 取消，航司工作人员称，张先生名下有7月20日下单的同航班订单。同程旅行工作人员称，已为张先生 原订单办理全额退款，将与其协调承担额外损失。 ...

United Airlines Mayday Call Handled 'By The Book,’ Says Aviation Expert https://t.co/6SDDWk08QQ ...

United Airlines Mayday Call Handled 'By The Book,’ Says Aviation Experthttps://t.co/nPQKDSx4vl https://t.co/KVSOwLlvGe ...

A United Airlines plane was forced to make an emergency landing after one of its engines stopped working. Flight 108 departed Washington Dulles around 8 p.m. on Friday, July 25, more than two hours behind schedule. The 12-year-old Boeing 787 Dreamliner then spent around 30 minutes in the air before returning to the airport, which is just outside the nation's capital. In separate statements, United and the Metropolitan Washington Airports Authority said this was due to "a mechanical issue." Air traffic contr ...

Core Points - United Airlines Flight 108 experienced an engine failure shortly after takeoff from Washington Dulles International Airport on July 25, prompting the pilot to issue a distress signal [1] - The Boeing 787 aircraft was carrying 219 passengers and 11 crew members and encountered the issue at an altitude of approximately 3,000 meters [1] - The pilot declared an emergency and issued a "Mayday" call, while air traffic control instructed the flight to return to the airport [1] - Due to the aircraft's heavy fuel load, it could not land immediately and had to remain airborne for over 30 minutes to adjust its weight before safely landing back at Dulles Airport [1] - United Airlines confirmed that the aircraft experienced a "mechanical failure," but all passengers and crew members disembarked safely [1]

据美国《纽约邮报》当地时间4日报道，美国联合航空公司一架航班于上月在起飞后不久引擎故障，飞 行员通过无线电紧急发出"Mayday（紧急求救）"信号。 报道称，美国联合航空公司108号航班7月25日 从华盛顿杜勒斯国际机场起飞。不久后，飞行员通过无线电向空中交通管制员报告称，"故障，引擎故 障，左引擎。" "宣布紧急情况。Mayday，Mayday，Mayday。"飞行员随后说。 据报道，该航班于当天 下午6时前起飞，原计划飞行近8小时横跨大西洋飞往德国慕尼黑。接到求救信号后，空管人员建议该航 班转向东北方向，准备返航杜勒斯国际机场。 报道称，机上共有219名乘客和11名机组人员，最终全部 安全下机。美国联合航空方面表示，涉事飞机出现了"机械故障"，但未透露更多具体情况。 ...

报道称，美国联合航空公司108号航班7月25日从华盛顿杜勒斯国际机场起飞。不久后，飞行员通过无线电向空中交通管制员报告称，"故障，引擎 故障，左引擎。" 【环球网报道】据美国《纽约邮报》当地时间4日报道，美国联合航空公司一架航班于上月在起飞后不久引擎故障，飞行员通过无线电紧急发 出"Mayday（紧急求救）"信号。 "宣布紧急情况。Mayday，Mayday，Mayday。"飞行员随后说。 报道称，机上共有219名乘客和11名机组人员，最终全部安全下机。美国联合航空方面表示，涉事飞机出现了"机械故障"，但未透露更多具体情 况。 据报道，该航班于当天下午6时前起飞，原计划飞行近8小时横跨大西洋飞往德国慕尼黑。接到求救信号后，空管人员建议该航班转向东北方向， 准备返航杜勒斯国际机场。 ...