A United Airlines jet experienced a landing gear wheel loss during takeoff from Los Angeles but managed to safely land in Denver with no injuries. This marks the second incident of its kind for the airline this year. The aircraft involved was a Boeing 757-200, carrying 174 passengers and 7 crew members. The wheel was found in Los Angeles, prompting an investigation into the event's cause. Various incidents involving United Airlines planes have occurred recently, including emergency landings due to hydraulic system issues, flames bursting from engines, and planes rolling off taxiways. In January, a door plug incident on an Alaska Airlines flight led to injuries and emergency landings. United Airlines reported a $200m hit to earnings due to the grounding of Boeing planes after the Alaska Airlines incident. These incidents highlight the importance of airline safety and maintenance protocols.