What happened
On April 16, 2004, a Partenavia P66C, registration I-IABT, crashed into a mountainside at Colle dei Meneghini, Italy, during a VFR flight. The aircraft, carrying a pilot and two passengers, had departed from Bolzano for Gorizia. During the flight, the pilot encountered deteriorating weather conditions, including reduced visibility and cloud cover.
As the aircraft traversed mountainous terrain, the pilot contacted Treviso Radar, reporting a loss of orientation and difficulty maintaining visual contact with the ground. Despite instructions from air traffic control to descend toward the plains and maintain visual contact, the pilot reported being unable to climb to the requested altitude due to the aircraft's performance limitations. Communication with the aircraft ceased at approximately 17:10 UTC. The wreckage was located four days later in a dense coniferous forest, and the three fatalities were confirmed at the scene.
The investigation
The ANSV investigation examined the flight history, meteorological reports, and the wreckage. Investigators found that the aircraft was in an airworthy condition and had undergone all required maintenance. However, the aircraft was not equipped with an Emergency Locator Transmitter (ELT), and the pilot had failed to file a flight plan, which is required for VFR flights without an ELT.
Analysis of the wreckage revealed a high-energy impact sequence involving multiple stages of deceleration as the aircraft struck trees before hitting the terrain. The investigation also noted that the fuel onboard was insufficient to allow for significant deviations from the planned route, and the aircraft's weight likely hindered its ability to climb out of the mountainous area.
Findings
- The primary cause of the accident was loss of situational awareness and spatial disorientation during flight through mountainous terrain characterized by low visibility.
- Poor flight planning and an inadequate assessment of meteorological conditions contributed to the accident.
- The pilot's decision to continue the flight despite encountering weather conditions unsuitable for VFR flight was a significant contributing factor.
- The aircraft's weight and limited performance constrained the pilot's ability to execute necessary altitude changes to avoid terrain.