Aeroflot Flight 17
| Industry | Aviation |
|---|---|
| Founded | 1923 |
| Headquarters | Moscow , USSR |
Area served | Soviet Union |
| Products | Air transport services |
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Template:Infobox aircraft occurrence
Aeroflot Flight 17 was involved in a fatal aviation accident on May 13, 1949, near Novosibirsk. The flight operated by Aeroflot utilized an Ilyushin Il-12 aircraft and resulted in the loss of all 25 individuals aboard.
Aircraft
The aircraft involved was an Il-12 (also designated Il-12P), bearing serial number 93013208 and production number 32-08. It was produced at the "Banner of Labor" factory in Moscow on March 14, 1949. Registered as CCCP-Л1791, the plane was assigned to the 1st separate aviation group of the Civil Air Fleet under the USSR Council of Ministers and based at Vnukovo Airport. At the time of the incident, the aircraft had been in service for only two months and had accumulated a total flight time of merely 51 hours.[1]
Accident
Flight 17 was operating a route from Moscow to Krasnoyarsk. After departing from an intermediate stop at Omsk at 12:13,[* 1] the aircraft proceeded toward its subsequent stopover in Novosibirsk. Weather forecasts predicted cloud cover between 1,000 and 1,500 meters with intermittent rain along the path, including potential thunderstorms later on. Although multiple warnings about thunderstorms over Novosibirsk were received by the Omsk dispatcher, this critical information was not relayed to Flight 17’s crew, nor was their flight restricted.[2]
At 13:28, authorization was granted for the crew to enter the Novosibirsk regional control area. Since approximately 13:00, the aircraft had been requesting clearance to enter Novosibirsk airport’s airspace; however, intense thunderstorm activity caused significant radio interference. The plane was placed into a holding pattern above Novosibirsk while awaiting communication. Contact with the airport was finally established at 14:00. Shortly thereafter, at 14:05, air traffic control permitted Flight 17 to approach and descend to an altitude of 700 meters despite it already being within the airport’s controlled zone. The last transmission from the crew occurred at 14:07 when they reported entering clouds with occasional ground visibility.[2]
Conditions over Novosibirsk included complete cloud cover accompanied by heavy rain and hail, strong gusting winds, and visibility reduced to between 100 and 200 meters. Approximately between 14:07 and 14:10, about six to eight kilometers northeast of the airport, witnesses observed the Il-12 flying within clouds. It is believed that at this point the captain attempted to exit the cloud layer by executing a sharp right turn while descending. Upon emerging from the clouds at an altitude estimated between 70 and 100 meters, the aircraft was found to be in a steep bank to the right. Losing further altitude during this maneuver, it ultimately collided with a four-meter embankment adjacent to a quarry at a bank angle of roughly 65°. The impact caused the plane to break apart; debris scattered beyond the embankment ignited upon contact with flammable materials. There were no survivors among the twenty passengers and five crew members on board.[2]
Investigation
The "cloud" reported by the crew was actually the trailing section of a severe thunderstorm cell. Upon entering this area, the Il-12 encountered intense turbulence unexpectedly. Forensic investigation revealed that both the first officer and the radio operator were unconscious at the moment of impact, with the first officer still holding onto the control yoke. It is probable that a lightning strike rendered some crew members incapacitated, leading to the first officer and radio operator losing consciousness, while the captain and flight engineer became alarmed and failed to adequately monitor flight instruments. In a state of panic, the captain attempted a rapid exit from the cloud by executing a steep descending turn; however, upon leaving the cloud, the aircraft faced heavy rainfall accompanied by large hailstones and strong gusts of wind. Moreover, control was further hindered by the second officer firmly grasping the yoke. Disoriented amid the adverse weather and neglecting instrument readings, the captain initiated a descent heading south and then southeast until the plane ultimately collided with terrain.
The investigative commission determined that the primary cause was flying into a thunderstorm cloud combined with lightning-induced incapacitation of two crew members. Under conditions of rain and hail, the remaining crew became disoriented and, likely due to panic, failed to maintain instrument vigilance or safe altitude. Several contributing factors were identified as significant in causing the accident:
- The thunderstorm was not predicted in the weather forecast.
- The aircraft entered the cloud from its rear portion, which appeared less threatening.
- Flight management deficiencies including inaccurate weather forecasting, unstable radio communications, failure to alert crew about thunderstorm warnings, and poor coordination among airport meteorological services along the route.
References
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