During takeoff from Los Angeles, a United Airlines aircraft lost a landing gear wheel; however, it made a safe landing in Denver, the intended destination, without any injuries. For the airline, it was the second such occurrence of the year.
In a statement, United stated, "The wheel has been recovered in Los Angeles, and we are investigating what caused this event."
The plane, a nearly 30-year-old Boeing 757-200 carrying 174 passengers and 7 crew members, was engaged in the incident on Monday, July 8.
The 757 was produced by Boeing until 2004. After taking off from San Francisco in March, a United Airlines Boeing 777-200 aircraft bound for Japan experienced a tire blowout mid-air.
The aircraft made a safe landing at Los Angeles International Airport. No one was injured when the wheel struck a car in the employee parking area at the airport, shattering the glass.
The incident on Monday was the most recent in a run of problems affecting aircraft operated by United Airlines.
A hydraulic system problem led one aircraft to make an emergency landing at Los Angeles International Airport in March. Another plane that month was rolling off the taxiway and into the grass when it was trying to land in Houston.
In March, United Flight 1118, a Boeing 737-900, carrying 167 passengers, experienced an emergency landing in Houston after blazing flames shot out of the engine while the plane was traveling from Houston to Fort Myers, Florida.
When an Alaska Airlines Boeing 737 MAX 9's door plug blew out in midair shortly after it took off from Portland, Oregon, forcing it to make an emergency landing, US aviation concerns shot to prominence in January.
Numerous individuals suffered injuries.United Airlines attributed a $200 million (£161 million) impact to its profitability in the first three months of the year to the incident in April, claiming that it was obliged to ground numerous Boeing aircraft due to rival Alaska Airlines' mid-flight rupture.