This report is compiled from the cited public sources and updated when verified information becomes available.
Developing report: A Gulfstream G-IV identified as N406JS left the paved runway area while landing at Spirit of St. Louis Airport in Chesterfield, Missouri, on August 14, 2026. Local authorities reported no injuries.
What happened
The business jet encountered a problem during its landing rollout and came to rest off the runway in a grassy area. First Alert 4 reported that the landing gear broke during the event and that 10 people were aboard. FOX 2 reported that airport officials described a mechanical issue and said no one was injured.
Photographs published by the local news outlets show the aircraft beyond the pavement with emergency personnel responding nearby. The available reports do not establish why the landing-gear problem occurred or whether it began before touchdown, during touchdown, or later in the rollout. Those questions require examination of the aircraft, crew statements, maintenance records, runway evidence, and any available recorded data.
Aircraft and flight information
The registration visible in reporting from the scene is N406JS. Aircraft registry information compiled by FlightAware from FAA data identifies N406JS as a 1999 Gulfstream Aerospace G-IV, serial number 1394, powered by two Rolls-Royce Tay turbofan engines.
The Gulfstream G-IV is a large-cabin business jet. This report does not assume that the aircraft model itself contributed to the excursion. At this stage, the confirmed aircraft identity helps distinguish this event from a separate runway departure involving a smaller piston airplane at the same airport one day earlier.
Emergency response
Airport and emergency personnel responded after the jet left the runway. Both local reports said there were no injuries. No fire or evacuation injury was reported in the sources reviewed for this update. The aircraft’s damage classification and the extent of any runway closure have not yet been confirmed through an investigating agency’s preliminary record.
Investigation status
The cause of the runway excursion has not been determined. Early descriptions such as “mechanical issue” and “landing gear broke” describe what witnesses or officials observed; they are not a probable-cause finding. This article will be updated if the FAA, NTSB, airport, operator, or another authoritative source releases additional information.
