What happened
On the afternoon of August 15, 2000, a French-registered ULM Technic DJINS ultralight aircraft, registration 41-AN, was performing a local flight near Aguiar da/Beira, Portugal. The pilot, the aircraft's owner, had been flying over a local religious festival (romaria) and subsequently landed in an open field in the Carvalhal area.
After some time, the pilot attempted to take off from this field, which was characterized by irregular ground, stones, and some trees. Witnesses reported that the pilot directed the takeoff run toward a large oak tree. During the takeoff roll, the aircraft tilted sharply to the left, entered a steep dive, and struck the ground with extreme force. The impact resulted in the death of the pilot and the total destruction of the aircraft.
The investigation
The GPIAAF investigation examined the aircraft's condition, the pilot's credentials, and the environmental factors at the scene. Investigators recovered the Rotax 503 engine and performed a technical analysis, which revealed significant maintenance neglect. The investigation also reviewed the pilot's medical and legal status, as well as the suitability of the takeoff site.
Technical examinations of the engine showed a dirty air filter and improper carburetor settings, specifically a mixture that was too lean at low speeds. Furthermore, the aircraft's structure showed signs of neglect, including animal nests found within the wings, suggesting that a proper pre-flight inspection had not been conducted. Toxicological analysis of the pilot's blood revealed an alcohol concentration of 0.33 g/l, which is a violation of aviation safety standards.
Findings
- The pilot attempted a takeoff from an unprepared field containing obstacles in the takeoff path.
- The pilot was operating under the influence of alcohol, which impaired decision-making and physical reactions.
- The aircraft suffered from deficient maintenance, particularly regarding the engine, which resulted in reduced power available for takeoff.
- Structural deficiencies were present in the aircraft, indicating a failure to perform a thorough pre-flight inspection.
- The pilot's French ultralight license was not valid at the time of the accident, and there was evidence of a lack of familiarity with Portuguese aeronautical regulations.