Status: | Accident investigation report completed and information captured |
Date: | Saturday 2 September 2017 |
Time: | 13:55 |
Type: | Antonov TR-301 |
Operator: | Polemaks |
Registration: | RA-40462 |
MSN: | 1G224-39 |
First flight: | 1987 |
Engines: | 1 Walter M-601B |
Crew: | Fatalities: 0 / Occupants: 1 |
Passengers: | Fatalities: 0 / Occupants: 0 |
Total: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Location: | near Turinskaya Sloboda, Sverdlovsk region ( Russia)
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Phase: | Approach (APR) |
Nature: | Parachuting |
Departure airport: | ? |
Destination airport: | ? |
Narrative:An Antonov TR-301 was damaged in a forced landing near the village of Turinskaya Sloboda in the Sverdlovsk Region of Russia.
The aircraft had dropped skydivers and was returning to the airstrip when a problem with the throttle emerged on final approach. The engine lost power, forcing the pilot to carry out a forced landing in swampy grassland some 1,900 metres before the airstrip.
The TR-301 is an An-2, converted by Tekhnoregion into a mono-plane by removing the lower wings. The engine was changed to a Walter M-601 turbine.
The Russian aviation regulator Rosaviatsia reported that the pilot refused medical care and screening test for metabolites of psychoactive substances. It was noted that he was "in a visible altered state of consciousness", according to Rosaviatsia.
Probable Cause:
Conclusion (translated from Russian):
Thee aviation accident with a TR-301 RA-40462 aircraft occurred most likely due to the engine becoming stuck in idle mode, which led to the need to perform an emergency landing, at which there was a nosing down of the aircraft.
The "freezing of revolutions" could occur due to one of the following two reasons:
- as a result of deformation in flight of engine control due to design errors and manufacturing defects (poorly performed welding) during its manufacture and installation on an aircraft
- as a result of driving the filter elements of the engine's fuel system with products vital activity of microbiological contamination and corrosion products due to the use of fuel not allowed to refuel the aircraft;
- admission to the operation of the engine, which before installation on the aircraft was in a mothballed state for a period significantly exceeding the allowable one.
Accident investigation:
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Investigating agency: | MAK Russia |
Status: | Investigation completed |
Duration: | 1 year and 7 months | Accident number: | final report | Download report: | Final report
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Classification:
Forced landing outside airport
Sources:
»
Rosaviatsia
Photos
accident date:
02-09-2017type: Antonov TR-301
registration: RA-40462
accident date:
02-09-2017type: Antonov TR-301
registration: RA-40462
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.