Incident Overview
Date: Sunday 27 June 2010
Aircraft Type: Antonov An-2R
Owner/operator: Vladimir Aviation Forest Protection
Registration Number: RA-62631
Location: near Voznesenskoye, Nizhny Novgorod region –
ÿ Russia
Phase of Flight: En route
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 3
Component Affected: Left float chamber needle valve of the carburetor.Left float chamber needle valve of the carburetor.
Investigating Agency: MAKMAK
Category: Accident
An AN-2 aircraft, RA-62631, experienced a forced landing on a lake due to engine instability and loss of power, resulting from a fuel-air mixture jamming of the left float chamber needle valve. The incident was caused by inadequate maintenance procedures, specifically a failure to comply with section 2.02.01.20 of the AN-2 maintenance rules, leading to a lack of required RTO (Required Technical Order) compliance during 100-hour maintenance.An AN-2 aircraft, RA-62631, experienced a forced landing on a lake due to engine instability and loss of power, resulting from a fuel-air mixture jamming of the left float chamber needle valve. The incident was caused by inadequate maintenance procedures, specifically a failure to comply with section 2.02.01.20 of the AN-2 maintenance rules, leading to a lack of required RTO (Required Technical Order) compliance during 100-hour maintenance.
Description
Forced landing on a lake. 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.
Primary Cause
Fuel-air mixture jamming of the left float chamber needle valve of the AN-2 aircraft.Fuel-air mixture jamming of the left float chamber needle valve of the AN-2 aircraft.Share on:
