Aeroflot Flight 521 was a scheduled passenger flight from Sheremetyevo International Airport to Dubai International Airport that, on 21 September 2001, belly landed at Dubai after the crew members forgot to activate the landing gear circuit breaker.

[1][3] The firefighters at the airport quickly extinguished the fire, and all 322 occupants were evacuated safely.

The Interstate Aviation Committee, Federal Air Transport Agency, Ilyushin, and Aeroflot took part in the investigation.

[4] The investigation concluded that the pilots initiated a poor approach configuration and violated several laws.

[3] Aeroflot had to pay each passenger an amount of money equivalent to 400 dollars as compensation.