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Last updated: 18 January 2022
Status:Final
Date:Sunday 27 June 2010
Time:15:45
Type:Silhouette image of generic AN2 model; specific model in this crash may look slightly different
Antonov An-2R
Operator:Vladimir Aviation Forest Protection
Registration: RA-62631
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
Aircraft damage: Damaged beyond repair
Location:near Voznesenskoye, Nizhny Novgorod region (   Russia)
Phase: En route (ENR)
Nature:Survey/research
Departure airport:?
Destination airport:?
Narrative:
Forced landing on a lake.

Probable Cause:

CONCLUSION:
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 resulted 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 2.02.01.20 of the rules of maintenance of the AN-2 while performing 100-hour maintenance works due to lack of RTO requirements for mandatory compliance.

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

Classification:
All engine powerloss
Forced landing outside airport

Photos

photo of Antonov-An-2R-RA-62631
accident date: 27-06-2010
type: Antonov An-2R
registration: RA-62631
 
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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