History: New York Air Disaster, 1960, New York City, United States

Accident
The United plane was supposed to have been circling a point called "Preston" (near South Amboy, New Jersey) at an altitude of 5,000 feet (1,500 m) at no more than 240 miles per hour (390 km/h). United later said that a ground beacon was not working (pilots testified on both sides of the issue).
At 10:21 a.m., Flight 826 advised its company radio operator that one of its VOR receivers had stopped working (although they did not notify air traffic controllers of the problem), making it difficult to navigate in instrument conditions. At 10:25 a.m., air traffic control issued a revised clearance for the flight to shorten its course to the Preston holding point by 12 miles (19 km). The United plane overshot the holding point.
The two aircraft collided in clouds about a mile west of Miller Field, a military airfield on Staten Island, at 10:33 a.m. Eastern Time. Weather conditions at the time were light rain and fog (which had been preceded by a snowfall). According to information from Flight 826's flight recorder (the first time a "black box" had been used to provide extensive details in a crash investigation), the United plane was 12 miles (19 km) off course and in 81 seconds dived 3,600 feet (1,100 m) a minute and dropped its speed from more than 500 miles per hour (800 km/h) to 363 miles per hour (584 km/h) when it collided with the right side of the TWA plane at between 5,250 and 5,175 feet (1,577 m).