What happened
The accident occurred during the initial climb phase of flight following takeoff from a dirt airstrip. The pilot had elected to fly despite having not slept for more than 24 hours, a condition that likely contributed to impaired judgment and reaction time. Prior to departure, frost had accumulated on the wings of the aircraft, degrading its aerodynamic performance.
As the airplane lifted off the ground, it climbed out of ground effect without achieving sufficient flying speed. Instead of maintaining the necessary airspeed to sustain flight, the pilot prematurely raised the flaps. This action reduced lift at a critical moment when the aircraft was already operating near its stall speed. The airplane subsequently stalled and impacted the ground.
The investigation
Investigation of the event focused on the operational conditions and pilot actions leading up to the crash. Key findings included the presence of frost on the wings, which is known to disrupt airflow and increase stall speed. Additionally, the premature retraction of flaps before a safe airspeed was established was identified as a critical error in aircraft handling.
Findings
The primary factors contributing to this accident were:
- Fuel exhaustion
- Pilot fatigue due to lack of sleep for over 24 hours
- Frost on the wings which degraded lift
- Premature flap retraction during climb-out
The combination of these elements resulted in a stall at low altitude with insufficient time or height to recover. The pilot's decision to fly while fatigued and with contaminated wings played a significant role in the outcome.
Safety message
Pilots must ensure they are well-rested before flight, as fatigue significantly impairs cognitive function and reaction time. Additionally, any contamination such as frost on the wings must be removed prior to takeoff, as it can severely affect aircraft performance. Proper airspeed management during climb-out is essential to avoid stalls.