1988 Soviet Air Force Il-76 crash

Soviet Air Force

Company type	Military
Industry	Aviation, Military
Headquarters	Soviet Union
Products	Military air transport

Template:Infobox aircraft occurrenceOn 11 December 1988, an Ilyushin Il-76M crashed while operating under the Soviet Air Force. This flight was part of the emergency response following the earthquake that struck Armenia on 7 December. During its approach to Leninakan Airport in Armenia (then within the Soviet Union), the plane collided with a mountainside, resulting in 77 fatalities out of the 78 individuals on board. This incident remains the deadliest aviation catastrophe recorded in Armenia.

Aircraft

At the moment of the crash, the aircraft was a decade old, having first taken flight in 1978. The passengers consisted of members of the Soviet Armed Forces—including 50 Azerbaijanis, 13 Lezgins, 11 Russians, 2 Tatars, one Armenian, and one Jewish individual. The flight crew comprised nine Russian nationals. Among those on board were 69 young soldiers assigned to assist with post-earthquake recovery operations.

Accident

This flight was part of the relief mission following the Spitak earthquake on 7 December, carrying military personnel and supplies intended for disaster assistance. It departed from Baku-Bina International Airport in Azerbaijan en route to Leninakan Airport in Armenia. Upon entering Leninakan airspace at 06:10 Moscow time—56 minutes after takeoff—the aircraft began descending from an altitude of approximately 5,300 m (17,400 ft), as directed by air traffic control. During descent, it impacted a mountain slope. All nine crew members and 68 of the 69 passengers lost their lives. The sole survivor was a passenger who had been resting inside a Kamaz truck loaded with mattresses located at the rear section of the plane.

Cause

One day following the accident, an Armenian official asserted that the plane had crashed due to a collision with a helicopter during its approach to the airport; however, this claim was challenged by various news outlets. Speculation also emerged suggesting that Armenian forces might have shot down the aircraft. Ultimately, the investigation determined that the crash resulted from an erroneous altimeter calibration by the pilots, causing the altitude reading to be approximately 1,100 m (3,600 ft) higher than the true height. At the moment of impact, the altimeter displayed an altitude of 1,425 m (4,675 ft). Additionally, crew exhaustion was identified as a contributing factor, given that the flight team had not received sufficient rest after conducting several relief missions the previous day.Template:Fix/category