Air accident near Nedakonice
| Air accident near Nedakonice | |
|---|---|
 A Let L-410 machine in factory livery |
|
| Accident summary | |
| Accident type | Structural failure after structural overload |
| place |
Nedakonice , Okres Uherské Hradiště , Czechoslovakia
|
| date | 7th July 1977 |
| Fatalities | 4th |
| Survivors | 0 |
| Aircraft | |
| Aircraft type |
Let L-410UVP
|
| operator |
LET Kunovice
|
| Mark |
OK-162
|
| Departure airport |
Kunovice Airfield , Uherské Hradiště , Czechoslovakia
|
| Destination airport |
Kunovice Airfield , Uherské Hradiště , Czechoslovakia
|
| Passengers | 0 |
| crew | 4th |
| Lists of aviation accidents | |
The air accident in Nedakonice occurred on July 7, 1977. On that day, broke a Let L-410UVP during factory test flight of LET Kunovice in the place Nedakonice , not far from the manufacturing plant, in the air apart and fell to the ground with all four occupants died. It was the first Let L-410 crash with fatalities.
machine
The affected machine was a Let L-410UVP made in Czechoslovakia . The L-410 prevailed against the Soviet Beriev Be-32 in a tender by the Council for Mutual Economic Aid (Comecon) and was therefore used by airlines from almost all Comecon member countries. The machine had the factory number 770608 and the model serial number 06-08 or X03 . It was the third prototype of the newly developed UVP version of the Let L-410, the machine was approved by the manufacturer with the aircraft registration OK-162 and flown for the first time in September 1976. The twin-engine regional airliner was equipped with two Walter M601 E turboprop engines .
Inmates
The machine was to be subjected to a special program of joint flight tests with a Soviet-Czech crew. In order to carry out this program from the State Research Institute for Civil Aviation in Czechoslovakia at the beginning of July 1977, the 39-year-old Soviet test pilot for the L-410 Gleb Sergeyevich Galitsky, who sat in the left pilot's seat, and the chief engineer Vladimir Maksimov arrived from Russia. The Czech crew members were the 50-year-old lead test pilot of the Let, Vladimír Vlk, and the flight engineer Miloslav Nosterský.
the accident
The test flight included checking the effectiveness of the rudder trim at different speeds and at different angles of deflection. The test program was almost complete. There was only a short flight segment to fly at top speed when the tail unit could not withstand the loads and broke off. The machine then fell to the ground, killing all four occupants. The crew had no time between the structural failure and the impact to determine the extent of the damage to the aircraft, and so the last radio message was: "... Tower, our rudder has torn off!" In the few seconds between the tearing off of the entire rear part of the fuselage and the impact, the Let chief pilot Vladimir Vlk was able to switch off most of the circuit breakers on the ceiling lining and reduce the power of the engines.
Due to the negligence of the Czech pilots, there were no parachutes on board that the pilots could have used to jump from the crashing plane and thus save their lives. The Czechs were so convinced of the reliability of their aircraft type that all test flights up to that day had been flown without parachutes on board. The plane crashed not far from the Nedakonice train station, seven kilometers from the airfield, and buried all four occupants under the rubble. The Let works fire brigade rushed to find out only the deaths of the four crew members.
Accident investigation
The accident report was published in February 1978. According to the report, the cause of the accident was a tear off of the rear part of the fuselage. This happened when the pilot in charge pressed the pedal for the rudder hard, which corresponded to a deflection of the rudder of 13 degrees during flight under full load. The structural load limits of the machine were exceeded as a result.
consequences
Due to the crash of the X03 prototype, there were a number of additional requirements for flight tests, so that in addition to the first three aircraft, three more prototypes of the L-410UVP were manufactured.
swell
- Accident report L-410, OK-162 , Aviation Safety Network
- Crash of a Let 410 in Uherské Hradiště: 4 killed , B3A - Bureau of Aircraft Accident Archives
- Company history and accident report , russianplanes.net (Russian)
- Let L-410 Turbolet , wbairliner.com (Russian)
- Prototypy L-410 , l410.cz (Czech)
Individual evidence
- ↑ Jochen K. Beek: Airplanes of the world 1919-2000 , Motorbuchverlag, ISBN 3-613-02008-4