Fatal Let-410 Accident in Khabarovsk Krai

6 fatalities • Российская Федерация, Хабаровский край, район н.п. Нелькан

A Let-410UVP-E20, registration RA-67047, was involved in a fatal accident in the district of the settlement of Nelkan, Russian Federation, on November 15, 2017.

On November 15, 2017, a Let-410UVP-E20, registered as RA-67047, was scheduled to fly from Khabarovsk to Nelkan via Nikolaevsk-on-Amur. During pre-flight preparations, the crew learned that Nikolaevsk-on-Amur airport was closed for runway cleaning. Following discussions with the dispatcher, the flight route was modified to Khabarovsk – Chumikan – Nelkan.

Before departure, the crew completed all mandatory pre-flight procedures, and technical staff performed an operational inspection with no defects noted. The aircraft was carrying two crew members, five passengers, and 410 kg of cargo. The total takeoff weight was 6368 kg, and the fuel load was 1250 kg.

The aircraft departed from Khabarovsk airport at 23:33 on November 14, 2017 (local time 08:00 on November 15). Weather conditions at the departure, route, and destination airports were within regulatory requirements for takeoff.

The accident resulted in six fatalities. No other injuries were reported.

Probable cause

The design of the variable-speed governor and its connection to the engine and governor allows for the Beta valve to jam. This jamming causes the governor installation angles to drop below minimum permissible levels, resulting in a spontaneous increase in governor speed, the activation of the Beta mode alarm, and a hydraulic lock.

Frequently asked questions

What happened in the 2017-11-15 Л-410 accident near Российская Федерация, Хабаровский край, район н.п. Нелькан?

A Let-410UVP-E20, registration RA-67047, was involved in a fatal accident in the district of the settlement of Nelkan, Russian Federation, on November 15, 2017.

Were there any fatalities in the 2017-11-15 Л-410 accident?

The accident was fatal, resulting in 6 fatalities.

What aircraft was involved and where did it happen?

The accident on 2017-11-15 involved a Л-410, registration RA-67047, operated by КГУП АК «Хабаровские авиалинии», at Российская Федерация, Хабаровский край, район н.п. Нелькан.

What was the probable cause of the accident?

The design of the variable-speed governor and its connection to the engine and governor allows for the Beta valve to jam. This jamming causes the governor installation angles to drop below minimum permissible levels, resulting in a spontaneous increase in governor speed, the activation of the Beta mode alarm, and a…

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