Aeroflot fight 558 departed Karaganda at 08:31 hours, bound for Moscow’s Domodedovo Airport. While en route at an altitude of 7200 m, a fire broke out in the baggage compartment. At 10:08 the crew began an emergency descent and changed course for an emergency landing at Magnitogorsk. Smoke intensified, severely hampering the crew in their attempts to position the aircraft for an approach to Magnitogorsk Airport. The aircraft flew with significant bank angles, overloads and fluctuations in height. At 10:15:50 the plane was in close proximity to the ground, after which it entered a steep climb with a significant overload. In 35 seconds the plane gained an additional height of 1300-1400 m. At 10:19:33 the airplane impacted the ground at a speed of about 370 km/h collided at a pitch and roll angle of about 0øand with the gears and flaps retracted. The aircraft came down 23 km north of the airport in a plowed field between the settlement of Smelovsky and the village of Pokrovka. The cause of the disaster was the intensive development of a fire that broke out in the rear cargo hold, which led to a complete or partial loss of the crew’s working capacity, the impossibility of visual flight and observation of instruments due to smoke in the cockpit and the exclusion of the possibility of a successful flight outcome. The most likely cause of the fire was the triggering of pyrotechnic devices, the ignition or self-ignition of flammable materials in the baggage of passengers whose traces were found in the remains of baggage.