Narrative:
The Tu-134 jet was attached to the Voroshilovgrad Higher Military Aviation School of Navigators and operated on a flight from Zhdanov (now Mariupol) to Voroshilovgrad (now Lugansk). The school's commander was on board as a passenger.
Twelve minutes after takeoff, at height of 4200 m, strong oscillations in pitch and a roll occurred. The plane suffered big vertical and lateral loadings and descended to 2750 m. After 38 seconds it disintegrated in mid-air.
During repairs at a military maintenance facility, two wires on the electrical circuit of the back-up yaw damper had been cross-wired. The main yaw-damper performed uneventful. On the accident flight however the plane passed through a zone of strong turbulence. The back-up yaw damper then kicked in, sending wrong commands to the elevator and the ailerons.
Loss of control
| Status: | |
| Date: | Friday 25 May 1984 |
| Time: | 18:34 |
| Type: |  Tupolev Tu-134Sh2 |
| Operator: | Soviet Air Force |
| Registration: | 02 |
| MSN: | 2350202 |
| First flight: | 1972 |
| Total airframe hrs: | 3173 |
| Cycles: | 2370 |
| Crew: | Fatalities: 6 / Occupants: 6 |
| Passengers: | Fatalities: 1 / Occupants: 1 |
| Total: | Fatalities: 7 / Occupants: 7 |
| Aircraft damage: | Damaged beyond repair |
| Location: | near Donetsk ( Ukraine)
|
| Phase: | En route (ENR) |
| Nature: | Military |
| Departure airport: | Zhdanov Airport (MPW/UKCM), Ukraine |
| Voroshilovgrad Airport (VSG/UKCW), Ukraine |
The Tu-134 jet was attached to the Voroshilovgrad Higher Military Aviation School of Navigators and operated on a flight from Zhdanov (now Mariupol) to Voroshilovgrad (now Lugansk). The school's commander was on board as a passenger.
Twelve minutes after takeoff, at height of 4200 m, strong oscillations in pitch and a roll occurred. The plane suffered big vertical and lateral loadings and descended to 2750 m. After 38 seconds it disintegrated in mid-air.
During repairs at a military maintenance facility, two wires on the electrical circuit of the back-up yaw damper had been cross-wired. The main yaw-damper performed uneventful. On the accident flight however the plane passed through a zone of strong turbulence. The back-up yaw damper then kicked in, sending wrong commands to the elevator and the ailerons.
Classification:
Wrong installation of parts Loss of control
Sources:
» airdisaster.ruPhotos
Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Zhdanov Airport to Voroshilovgrad Airport as the crow flies is 206 km (129 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.
Distance from Zhdanov Airport to Voroshilovgrad Airport as the crow flies is 206 km (129 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.
This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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