Sknyliv air show disaster

The Sknyliv air show disaster occurred on 27 July 2002, when a Ukrainian Air Force Sukhoi Su-27 piloted by Volodymyr Toponar and co-piloted by Yuriy Yegorov crashed during an aerobatics presentation at Sknyliv airfield near Lviv, Ukraine. The accident killed 77 people and injured 543, 100 of whom were hospitalised. It is the deadliest air show accident in history.

More than 10,000 spectators attended the Saturday air show, staged to commemorate the 60th anniversary of the Ukrainian Air Force's 14th Air Corps. The Su-27 aircraft was flown by two experienced pilots; it entered a rolling maneuver at 12:52 p.m. with a downward trajectory at low altitude. It rolled upright once more and was still descending rapidly when the left wing dropped shortly before it hit the ground, at which point the crew initiated ejection. The aircraft flattened out initially, skidding over the ground towards stationary aircraft and striking a glancing blow against the nose of an Ilyushin Il-76 transport aircraft before beginning to explode and cartwheel into the crowd of spectators.

Wikipedia