What happened
During the landing phase of the flight, the aircraft touched down on a 4,42-ft runway at approximately 91 knots, which was significantly higher than the target speed of 76 knots. The touchdown occurred 1,280 feet past the runway threshold, leaving only 2,408 feet of usable runway remaining. Upon contact with the pavement, the pilot attempted to decelerate by applying the brakes; however, the pilot believed the braking system was non-functional and attempted to pump the pedals. Due to the lack of remaining runway, a go-around was not possible. The aircraft traveled 2,600 feet along the runway before exiting the end of the pavement and striking a berm. The impact caused substantial damage to the right wing of the aircraft type.
Findings
Post-accident inspections of the braking system revealed no mechanical failures or anomalies that would have prevented normal operation. Data from the diagnostic storage unit indicated that the deceleration rate during this specific landing was consistent with, or even superior to, the performance observed in previous flights. Investigation determined that the pilot's failure to utilize the ALL INTERRUPT button was a critical factor. The pilot was neither aware of nor trained on this specific procedure, which is designed to disable the anti-skid system to restore manual braking effectiveness. Ultimately, the overrun was caused by a combination of an excessive touchdown speed and a late touchdown point relative to the available runway length.