All nine people aboard a Learjet were killed Sunday afternoon when the plane nosedived into a residential neighborhood in Palm Beach County, Florida, erupting into a large fireball on impact.
The Federal Aviation Administration and the National Transportation Safety Board are investigating the crash. The NTSB said it is the second-deadliest plane crash in the United States so far this year. According to reporting on the incident, the pilot had reported ice accumulation on the aircraft and moderate turbulence in the minutes before the crash, details that investigators will weigh heavily as they reconstruct the aircraft's final minutes.
Investigations into crashes of this kind typically examine a wide range of factors, including weather conditions at the time, maintenance records, pilot communications with air traffic control, and the aircraft's flight data and cockpit voice recorders if they can be recovered. Ice buildup on an aircraft's wings and control surfaces can affect lift and handling, which is why pilots are trained to report icing conditions so that air traffic controllers and other nearby aircraft can be alerted and adjust their routes or altitudes accordingly.
Local authorities in Palm Beach County responded to the scene, and officials have not yet released the names of those on board pending notification of family members. A fuller account of what happened is expected as the NTSB's investigation proceeds, a process that typically takes months to produce a final report, though preliminary findings are sometimes released within weeks to help inform immediate safety concerns.
Plane crashes involving private jets of this size are relatively rare compared with commercial aviation accidents, and federal investigators typically coordinate closely with local fire and emergency services, as they did in Palm Beach County, to secure the wreckage site before beginning the technical phase of the investigation.
What caused the crash?
The cause has not been officially determined; the pilot had reported ice buildup and moderate turbulence shortly before the crash, and the NTSB is investigating.
How many people died?
All nine people aboard the aircraft were killed.