Introduction
A functional test flight and qualitative engineering evaluation of an airplane's longitudinal control during landing resulted in a hard landing. The pilot was assessing the aircraft's performance under specific conditions.
Sequence of Events
During final approach to runway 12L, the pilot reduced the engines to flight idle and established a speed of 95 knots indicated airspeed. As the airplane neared the runway, the pilot attempted to flare by raising the nose to arrest the descent rate. However, the pilot was unable to raise the nose sufficiently, causing the airplane to land hard onto the runway.
After the hard landing, the airplane was taxied to the ramp and secured. Post-flight inspection revealed no mechanical failure, and no mechanical issues were reported.
Findings
The investigation determined that the airplane's landing capability was exceeded during the event. Additionally, the lack of performance data was identified as a factor in the accident. No other mechanical or system anomalies were found.
Probable Cause
The landing capability of the airplane was exceeded. The lack of performance data was a factor in the accident.