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Accident description
Last updated: 20 November 2017
Date:Sunday 27 June 2010
Type:Silhouette image of generic AN2 model; specific model in this crash may look slightly different
Antonov 2R
Operator:Vladimir Aviation Forest Protection
Registration: RA-62631
C/n / msn: 1G178-23
First flight: 1978
Total airframe hrs:3208
Engines: 1 PZL Kalisz (Shvetsov) ASz-62IR
Crew:Fatalities: 0 / Occupants: 2
Passengers:Fatalities: 0 / Occupants: 1
Total:Fatalities: 0 / Occupants: 3
Airplane damage: Damaged beyond repair
Location:near Voznesenskoye, Nizhny Novgorod Region (   Russia)
Phase: En route (ENR)
Departure airport:?
Destination airport:?
Forced landing on a lake.

Probable Cause:

The accident without casualties concerning AN-2 aircraft RA-62631 was the result of a forced landing on the water surface due unstable operation of the engine with the loss of power which resuloted from the re-enrichment of the fuel-air mixture because of jamming of the needle valve of the left float chamber of the carburetor.
The most probable reason for jamming of the needle valve of the left float chamber is its clogging by foreign particles that resulted from failure to comply with section of the rules of maintenance of the AN-2 while performing 100-hour maintenance works due to lack of RTO requirements for mandatory compliance.


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