Accident Event
During final approach, the aircraft began to descend below the flight path the pilot intended. Remedial actions taken by the pilot were insufficient to correct the deviation. Consequently, the aircraft impacted the ground short of the runway, causing the landing gear to collapse.
Investigation Findings
Investigation into the accident revealed that the pilot had selected 40 degrees of flaps, rather than the 30 degrees that had been used during the pilot's training. The aircraft was equipped with a set of controls that allowed the pilot to operate the rudder pedals by hand.
Pilot Information
The pilot was a paraplegic and had a reduced hearing ability, which severely restricted his verbal communication.
Conclusion
No probable cause was stated in the official investigation.