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Siberian Light Aviation Flight 51

RA-67042, the Let L-410UVP-E20 involved in the crash, in December 2015
Accident
Date	12 September 2021 (2021-09-12)
Summary	Controlled flight into terrain caused by Pilot error
Site	4 km short of the runway near Kazachinskoye Airport 56°15′04″N 107°32′05″E / 56.25123°N 107.53474°E / 56.25123; 107.53474
Aircraft
Aircraft type	Let L-410UVP-E20
Operator	Aeroservice on behalf of Siberian Light Aviation
Registration	RA-67042
Flight origin	Irkutsk Airport
Destination	Kazachinskoye Airport
Occupants	16
Passengers	14
Crew	2
Fatalities	4
Injuries	12
Survivors	12

Siberian Light Aviation Flight 51 was a passenger flight on September 12, 2021, by a Let L-410 Turbolet plane, from Irkutsk north to Kazatjinskoje, Irkutsk Oblast, Siberia, near Lake Baikal. The plane crashed about 4 kilometers (2.5 miles) from the airport.

The Interstate Aviation Committee (IAC or MAK), the Russian Accident Commission, determined that the crash was caused by the crew failing to comply with night flight rules.

The flight was operated on behalf of Aeroservice LLC. ^{[1] [2]}

Background

The aircraft, a Let L-410 Turbolet model UVP-E20, was manufactured and commissioned in 2014. The Let-410 is built by Czech aerospace manufacturer Let Kunovice.

The airline Siberian Light Aviation, also known by the name of Sila Avia, was founded in January 2017 and flies short-haul flights in Siberia and areas just southwest of Siberia such as Omsk, Tiumen, Yekaterinburg, Chelyabinsk and Nizhny Tagil. Their headquarters is in Magadan. At the time of the accident, there were eight L-410 aircraft and three Antonov An-28 aircraft in their fleet.

After a previously spotless safety record, Flight 51 was the airline's second serious incident in 2021. On July 17, Siberian Light Aviation Flight 42, an Antonov-28 with 2 pilots and 15 passengers, suffered a dual engine failure and crash landed in a remote area in the Vasyugan Swamp in southwestern Siberia. In that accident, all of the occupants survived the accident with one crew member requiring surgery.

Crew

The captain of Siberian Light Aviation Flight 51 had just over 5,600 flight hours at the time of the accident, including 483 hours as captain.

Accident

After an earlier failed landing attempt at 10:35 p.m., the accident occurred at about 11:15 p.m. local time during the crew's second attempt to land the plane. In thick fog, the plane collided with trees on a cliff next to the Kirenga River, about 2.5 mi (4.0 km) southwest of the runway.

Rescuers were quickly on the scene and initially managed to rescue everyone on board. According to the region's governor, Igor Kobzev, five people were able to leave the wreckage on their own while the others had to be helped or carried out. Four people died from their injuries within 24 hours of the accident. Of the 16 people on board, 12 survived. Three passengers and the co-pilot were killed.

Investigation

MAK, the Russian Accident Commission, launched an investigation into the accident on the same day.

The investigation has shown that visibility was no more than 500 metres either at the time of the plane's first failed landing attempt or at the time of the accident.

Kazatjinskoje Airport lacked sophisticated radar systems and the ability for aircraft to make instrumental landings (ILS). In the aftermath of the crash, Rosaviatsia, Russia's regulatory committee on civil aviation, has proposed an investigation and the possibility of banning night landings in Kazatjinskoje and other airfields in Russia in the future, where visual landings are the only possibility and facilities for instrument landings are missing.

While the media speculates about pilot mistakes in flight in bad weather, the surviving captain has said in interviews after the accident that important navigational instruments were out of order and that played a role in the accident.

Conclusions

In the report released by the Russian Interstate Aviation Committee (MAK) it was established that the probable cause of the accident was the pilots' failure to comply with night flight rules, leading them to make an approach with visibility below the established minimum levels, sending the plane into collision with trees during controlled flight. The investigation report found other factors contributing to the accident, which centered on crew errors including failure to take timely action in landing at an alternative airport, reduced situational awareness in the use of autopilot and poor interaction among pilots who did not fully control the flight parameters. ^[3]

External links

• Interstate Aviation Committee investigation pages: English version and Russian version
• Aerial view of the crash site (video)

References