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Aeroflot Flight 3630 was a regularly scheduled passenger flight operated by Aeroflot from Mineralnye Vody Airport to Vilnius Airport with a stop over at Rostov-on-Don Airport. On 2 September 1970, the Tu-124 operating this flight crashed after a loss of control at cruise altitude, 42 minutes after take off from Rostov-on-Don Airport. All 32 passengers and five crew members were killed.

Aeroflot Flight 3630
A Tupolev Tu-124V similar to the accident aircraft
Accident
Date2 September 1970 (1970-09-02)
SummaryLoss of control for reasons unknown
Sitenear Dnipropetrovsk, Ukraine
Aircraft
Aircraft typeTupolev Tu-124
OperatorAeroflot
RegistrationСССР-45012
Flight originMineralnye Vody Airport
StopoverRostov-on-Don Airport
DestinationVilnius Airport
Occupants37
Passengers32
Crew5
Fatalities37
Survivors0

The Air Accident Investigation Commission was unable to discover the root cause of the accident.


Accident


After a brief stopover, Flight 3630 departed Rostov-on-Don Airport at 14:55 Moscow time and at 15:14 reported passing over Donetsk at 8,400 meters. A short time later air traffic control (ATC) requested a rapid climb to 9,000 metres (30,000 ft) to avoid traffic and at 15:16 the flight reported reaching 9,000 metres (30,000 ft). At 15:31 the crew contacted ATC announcing in a calm tone their ground speed was 852 km/h (460 kn; 529 mph) and that they expected to pass over Kremenchug at 15:41. Then at 15:37 controllers received a short message from flight 3630 consisting of "Forty Five - Zero - Twelve" with the word twelve spoken with a frantic inflection. This was the last contact with the flight. The aircraft entered a steep pitch down as it rolled left, striking the ground at approximately a 70 degree angle at 950 km/h (513 kn; 590 mph).[1][2]


Aircraft


Construction of the Tu-124 involved, serial number 1350402 04-02, was completed at production factory 135 in Kharkiv, Ukraine, on 30 September 1961 and it was transferred to the civil air fleet. At the time of the accident, the aircraft had sustained a total of 7,504 flight hours and 6,996 cycles.[1]


Investigation


The aircraft created a deep cone-shaped crater at impact, destroying much of the airframe. The flight data recorder was damaged beyond recovery of any data but the Air Accident Investigation Commission were able to determine that the engines were set to idle power, the flaps, spoilers and landing gear were all in the retracted position and that rudder trim was full right with the left aileron trim full up.[1][2]

Weather along the flight route was calm and ruled out as a possible cause.[1]

Investigators looked into the possibility that the aircraft collided in flight with an unmanned military vehicle or a weather balloon but no evidence surfaced. The commission found no evidence of an in flight aircraft failure or structural break up. The right engine and other sections of the aircraft displayed damage due to fire and investigators considered that a fire in flight may have caused the accident. An examination of the victims found no smoke had been inhaled and further analysis of the crash site determined all fire damage occurred during the post crash fire so this possibility was ruled out.[1][2]

The investigators were able to conclude that full deflection of the rudder and left aileron trim would have significant effects on control of the aircraft at cruising speed but the chain of events leading to the accident was never determined.[1][2]


See also



References


  1. "Accident of Tu-124 of the Lithuanian Civil Aviation Administration in the Dnipropetrovsk region". airdisaster.ru. Dmitry Ertsov, Alexander Fetisov. Retrieved 23 September 2019.
  2. "Wednesday 2 September 1970". aviation-safety.net. Aviation Safety Network. Retrieved 23 September 2019.

На других языках


[de] Aeroflot-Flug 3630

Am 2. September 1970 stürzte eine Tupolew Tu-124 auf dem Aeroflot-Flug 3630 von Mineralnyje Wody über Rostow am Don nach Vilnius ab, wobei alle 37 Insassen starben.
- [en] Aeroflot Flight 3630

[it] Volo Aeroflot 3630

Il volo Aeroflot 3630 era un volo di linea operato da Aeroflot, partito dall'aeroporto di Mineral'nye Vody e diretto all'aeroporto di Vilnius con scalo all'aeroporto di Rostov sul Don. Il 2 settembre 1970 il Tu-124 che operava questo volo si schiantò dopo aver perso il controllo all'altitudine di crociera, 42 minuti dopo il decollo dall'aeroporto di Rostov sul Don. Tutti i 32 passeggeri e i cinque membri dell'equipaggio rimasero uccisi.

[ru] Катастрофа Ту-124 под Днепропетровском

В среду 2 сентября 1970 года в Днепропетровской области разбился Ту-124 компании Аэрофлот, выполнявший рейс 3630 (Минеральные Воды — Ростов-на-Дону — Вильнюс), в результате чего погибли 37 человек.



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