On 5 March 2011, an Antonov An-148 passenger jet broke up in mid-air and crashed on the outskirts of Garbuzovo, a village in the Belgorod Oblast of Russia.

[1] The subsequent investigation concluded that the aircraft broke up after the crew allowed it to substantially exceed its maximum design speed during a practice emergency descent.

[4][5] The wreckage was found strewn along a 3-kilometre-long (2 mi) track, after witnesses on the ground reported seeing parts of the airframe breaking off before impact.

The abnormal aerodynamic stress exceeded the strength of the airframe, inducing low-frequency oscillations that eventually resulted in structural failure and in-flight break-up.

Contributing factors were lack of proper crew coordination in executing the emergency descent, deviations from recommended procedures and the misleading indications provided by basic flight instruments while outside normal operating conditions.