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Last updated: 7 December 2019
Status:Final
Date:Saturday 26 August 2017
Time:17:50
Type:Silhouette image of generic AN2 model; specific model in this crash may look slightly different
Antonov An-2R
Operator:Aviakompaniya Feniks
Registration: RA-33036
C/n / msn: 1G218-23
First flight: 1986
Total airframe hrs:4754
Cycles:12934
Engines: 1 Shvetsov ASh-62IR
Crew:Fatalities: 0 / Occupants: 2
Passengers:Fatalities: 0 / Occupants: 0
Total:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Aircraft fate: Written off (damaged beyond repair)
Location:75 km (46.9 mls) W of Yeniseisk, Krasnoyarsk Territory (   Russia)
Phase: En route (ENR)
Nature:Agricultural
Departure airport:Yeniseisk Airport
Destination airport:?
Narrative:
The Antonov 2R biplane operated on aero-chemical flight over the Yenisei Forest in Russia.
On the fortieth minute of the flight along the route there appeared smoke of the cockpit of medium intensity. The captain decided to terminate the task and return.
After 30 km of flight the smoke intensity increased significantly. The crew heard blows in the area of the engine, after which vibrations were felt, accompanied by a loss of power. Oil was seen flowing onto the windows and wings. The engine did not respond to the propeller pitch and thrust movement. The captain then decided to make a forced landing in the forest.
During the landing, the aircraft collided with trees and the ground surface, resulting in significant damage to the aircraft. The crew members suffered minor injuries.

Probable Cause:

Conclusion (translated from Russian):
The cause of the aviation accident with the AN-2 RA-33036 aircraft was the decrease of power of the ASh-62 IR engine due to fatigue failure of cylinder No. 5.
Fatigue failure of the cylinder occurred due to a manufacturing defect - no blunting of sharp edges at the Ø 12 mm bore for the stud bolt of the sleeve to the crankcase in the most loaded zone.
Probable factor contributing to the failure could be the irregularity of the cylinder flanges and engine crankcase in the specified area.

Accident investigation:
cover
Investigating agency: MAK
Status: Investigation completed
Duration: 1 year
Accident number: final report
Download report: Final report

Classification:
All engine powerloss
Forced landing outside airport

Sources:
» MAK
» krsk.kp.ru


Photos

photo of Antonov-An-2R-RA-33036
accident date: 26-08-2017
type: Antonov An-2R
registration: RA-33036
photo of Antonov-An-2R-RA-33036
accident date: 26-08-2017
type: Antonov An-2R
registration: RA-33036
photo of Antonov-An-2R-RA-33036
accident date: 26-08-2017
type: Antonov An-2R
registration: RA-33036
 
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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