3 fatalities

2005-10-30: Let L-410 (9A-BTA) — Trade Air — Bergamo-Orio al Serio, Italy

Bergamo-Orio al Serio, ItalyTakeoff (climb)

On October 30, 2005, a Let L-410 (registration 9A-BTA) operated by Trade Air was involved in an aviation accident near Bergamo-Orio al Serio, Italy during takeoff. 3 people were killed. Investigators recorded the probable cause as: As far as is established, documented and substantiated, the cause of the accident is due to a loss of control in flight of the aircraft. This summary draws on records from the Bureau of Aircraft Accidents Archives (B3A).

Sourcesthe Bureau of Aircraft Accidents Archives (B3A)Primary reportUpdated 1781199242Data APIEditorial standards

A twin-engine cargo aircraft crashed one kilometer north of Bergamo-Orio al Serio Airport after takeoff, killing all three occupants. The aircraft clipped a powerline and disintegrated in an open field.

Accident Details

On a night cargo flight from Bergamo-Orio al Serio Airport to Zagreb, a twin-engine aircraft departed runway 28 carrying two pilots, one passenger (the captain's wife), and a load of 1,600 kilograms of small packages. During climb in foggy conditions, the aircraft entered a left turn and descended, striking a powerline before crashing in an open field one kilometer north of the airfield. The aircraft disintegrated on impact, and all three occupants were killed.

Investigation Findings

The official investigation determined that the cause of the accident was a loss of control in flight. While the exact reason for the loss of control could not be established with incontrovertible certainty, investigators reasonably assumed it stemmed from a deterioration in crew situation awareness during the initial climb immediately after takeoff. Factors that may have contributed to this loss of situation awareness included: the displacement or incorrect positioning of the load, which could have induced a rolling moment not immediately perceived and corrected by the crew; and spatial disorientation possibly caused by an optical illusion from the high-speed "E" taxiway lights, which, penetrating the thick fog, may have led the pilot to veer, resulting in the final loss of control. Additionally, the co-pilot's limited flight experience and the crew's inadequate application of Crew Resource Management (CRM) techniques prevented timely identification of the hazardous situation and necessary recovery actions.

Probable cause

As far as is established, documented and substantiated, the cause of the accident is due to a loss of control in flight of the aircraft. Although the cause of this loss of control could not be established with incontrovertible certainty, it can reasonably be assumed that it was caused by a deterioration in the situation awareness of the crew during the initial climb immediately after take-off. The loss of such situation awareness may have been contributed jointly or severally: - The displacement or incorrect positioning of the load, which would have induced a moment of rotation on the longitudinal axis of the aircraft (roll) not immediately perceived and counteracted by the crew; - Spatial disorientation, as a result of the possible optical illusion produced by the high speed "E" TWY lights, which, crossing the thick fog, could have induced the pilot to veer, thus causing the final loss of control of the aircraft. In addition, the limited flight experience of the co-pilot and the inadequate application of CRM techniques by the crew did not allow for a timely identification of the hazardous situation and the necessary actions to recover the aircraft.