ASN Aircraft accident Antonov An-2SX RA-40649 Evenki district, Krasnoyarsk Krai
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Status:Accident investigation report completed and information captured
Date:Monday 30 July 2018
Time:20:30
Type:Silhouette image of generic AN2 model; specific model in this crash may look slightly different
Antonov An-2SX
Operator:private
Registration: RA-40649
MSN: 1G213-56
First flight: 1985
Total airframe hrs:4447
Engines: 1 Shvetsov ASh-62IR
Crew:Fatalities: 0 / Occupants: 2
Passengers:Fatalities: 0 / Occupants: 5
Total:Fatalities: 0 / Occupants: 7
Aircraft damage: Substantial
Location:Evenki district, Krasnoyarsk Krai (   Russia)
Phase: Takeoff (TOF)
Nature:Private
Departure airport:?
Destination airport:?
Narrative:
The Antonov An-2 operated on private fishing trip flights in the Evenki district. The pilots landed the aircraft on a strip of grass on the bank of the river Yangeto to pick up the passengers.
On takeoff the engine shuddered and lost power. The aircraft then struck the bank on the other side of the river, causing serious damage.

Probable Cause:

Conclusion:
The aircraft accident with An-2C/X RA-40649 occurred as a result of a rough landing with increased vertical speed during an emergency landing, the need for which was caused by a drop in engine power. The loss of engine power occurred due to destruction of the exhaust manifold flame pipe, which resulted in loss of engine power on takeoff due to penetration of hot exhaust gases through a 30% open carburetor flap. The damage to the flame tube of the exhaust manifold is most likely of a fatigue nature and is associated with unacceptable damage to the holes for the bolts fixing it to the flexible manifold. In the process of flame tube repair, the repair technology was violated when performing the crack repair operation, which led to material overheating and softening. A contributing factor was the lack of a site suitable for a forced landing in the immediate vicinity of the takeoff path.

Accident investigation:

cover
Investigating agency: MAK Russia
Status: Investigation completed
Duration: 1 year and 8 months
Accident number: final report
Download report: Final report

Classification:

All engine powerloss
Forced landing outside airport

Photos

photo of Antonov-An-2SX-RA-40649
accident date: 30-07-2018
type: Antonov An-2SX
registration: RA-40649
 
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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