Loss of Control in Flight · NTSB ERA12FA256
ANDERSON JOHN H AVID FLYER MK 4 — Waxhaw, NC
| Date | March 26, 2012 |
| Location | Waxhaw, NC |
| Aircraft | ANDERSON JOHN H AVID FLYER MK 4 (amateur-built) |
| Purpose of flight | Personal |
| Conditions | Day · Visual Meteorological Cond |
| Phase / occurrence | Uncontrolled descent Collision with terr/obj (non-CFIT) |
| Pilot age | 63 |
| Pilot total time | 265 hrs · Low time |
| Time in type | 9 hrs |
| Fatalities | 1 |
Probable cause
NTSB findings
- Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Airspeed-Not attained/maintained - C
- Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
What happened
According to several pilot-rated eyewitnesses, the airplane was about 30 feet above ground level in about a 30-degree nose-up attitude, while performing a go-around. The pitch attitude of the airplane decreased about treetop level, and one eyewitness stated that the airplane was in a near-vertical nose-down attitude just before entering a spin, followed by the sound of the impact. Another witness indicated that the engine maintained power throughout the accident sequence. Examination of the airframe and engine revealed no evidence of mechanical malfunction or failures that would have precluded normal operation. While the airplane was equipped with a parachute system that was not armed by the pilot before flight, the low altitude at which the pilot lost control of the airplane would have made a successful deployment doubtful even with the system armed. A review of the pilot's medical history did not suggest impairment or incapacitation. It is likely that, considering the close proximity of the recorded groundspeed data to the published stall speed, that the airplane speed during the go-around decreased below the stall speed, which resulted in a low-altitude aerodynamic stall.