Leonardo AW139 crash near Kabba, Kogi, Nigeria

The helicopter had been chartered for the presidential election campaign and was carrying the Nigerian vice president, Yemi Osinbajo, and his brother among twelve on board. On arrival at an unsurveyed site at Kabba it met brownout in the hover, the crew lost their external visual references and misjudged height and distance, and the helicopter landed hard and rolled onto its right side. It was destroyed. Nobody was hurt. Inappropriate landing technique, failure to follow company procedure for anticipated brownout, and the absence of a risk assessment or any site preparation were found contributory.