[1] Late on Tuesday, December 26, 1989, Flight 2415 crashed while attempting to land at Pasco's Tri-Cities Airport, killing both pilots and all four passengers aboard.

[1]: 9  The aircraft was manufactured two years earlier in October 1987, and had accumulated approximately 4,972 flight hours at the time of the accident.

[1]: 40  From the plane's last recorded position, investigators determined that Flight 2415 would need to follow a 7-degree glidepath in order to descend rapidly enough to reach the runway threshold.

[1]: 40  Investigators also determined that ice had likely built up on the plane's wings during the flight,[4] creating a higher risk of a stall at low speeds.

[1]: 40 [5] On November 4, 1991, the NTSB issued its final report on the crash, which contained the following conclusions:[1]: 47 The National Transportation Safety Board determines that the probable cause of this accident was the flightcrew's decision to continue an unstabilized instrument landing system approach that led to a stall, most likely of the horizontal stabilizer, and loss of control at low altitude.

Contributing to the accident was the air traffic controller's improper vectors that positioned the airplane inside the outer marker while it was still well above the glideslope.