What happened
During a low-level route earlier in the day, the aircraft experienced a malfunction in one of its left-side engines. The engine became uncontrollable and was subsequently shut down by the crew. Several hours later, while performing a night approach to Griffiss during a heavy rainstorm, the co-pilot followed standard checklists and activated the starter switches for all engines, including the previously deactivated unit.
As the aircraft descended, the windmilling engine spontaneously reignited and began accelerating toward maximum power. The flight crew was unaware that this engine was increasing thrust. During the flare phase of the landing, the high power setting prevented the aircraft from decelerating sufficiently to utilize the brakes. Although the drag chute was released, it failed to deploy properly.
Realizing the aircraft could not stop within the remaining runway length, the pilot attempted a go-around by increasing power. However, determining that the end of the runway was imminent, the pilot reduced power and notified the crew of an impending overrun. The aircraft exited the runway and struck an embankment, causing the airframe to separate just behind the crew compartment. During the excursion, the landing gear and AGM 28 missiles were sheared off, while the malfunctioning engine continued to run.
Findings
All crew members survived the accident. The heavy rain and resulting mud are believed to have prevented a post-impact explosion. The primary factor in the inability to stop was hydroplaning on the runway surface.