According to officials, all four people on board died when their aircraft went down during a test flight in the state of Washington.

According to the findings of the National Transportation Safety Board, the single-engine aircraft went down in a field of agriculture on November 18 at around 10:20 a.m., not far from Harvey Field Airport in Snohomish County from where the plane took flight.

The federal agency said that the departure time for the aircraft from Renton was somewhere around 9:30 in the morning.

According to the NTSB, its right wing detached in flight and was located around 200 yards from the wreckage of the aircraft.

Raisbeck Engineering’s motive towards leasing the Cessna Grand Caravan 208B EX was to gather “baseline aircraft performance data”, says the president of the organization.

“The aircraft was in this initial testing phase and had not yet been modified in any way by Raisbeck,” Chrisman said.

According to the statement, the crew consisted of “two highly experienced test pilots,” each of whom had logged more than 10,000 flying hours, together with a flight test director and an instrumentation engineer.

According to reports from KING-TV, an individual saw the jet crash from his kitchen window.

“I had just witnessed a plane catastrophe of some sort, this plane is coming down and it comes spiraling down,” Ken Baxter told the news outlet.

According to fire authorities, who spoke with KIRO-TV, the aircraft fell into a field in a region that included rugged terrain, foliage, and irrigation canals, all of which made it tough to approach.

The NTSB and the FAA are conducting an investigation into the disaster.

According to the National Transportation Safety Board (NTSB), a preliminary report will be produced in two to three weeks, and the inquiry will be finished in 12 to 24 months. The medical examiner is yet to determine the identities of the four individuals.