MOSCOW, November 14 (RAPSI) – Probe into a Boeing air crash that occurred in Kazan, the capital of Russia’s Republic of Tatarstan, in November 2013 and resulted in the death of 50 people including the crew, is completed, the Investigative Committee’s press service reports Thursday.

Investigators revealed that the crash was caused by a piloting error. According to the investigation, commander Rustem Salikhov was low-skilled and was approved for passenger-carrying operations base on forged documents.

Case papers read that on November 17, 2013, Salikhov when operating a flight from Moscow to Kazan during the landing committed an airplane upset. However, the second pilot Victor Gutsul failed to assume the control of the vehicle.

The pilots’ prosecution was terminated because of his death. Several aviation officials, who allowed Salikhov, to become the crew commander, were charged with negligence and violation of air safety rules resulted in the death of two or more people.