Sacha Awia Flight 301
| Sacha Awia Flight 301 | |
|---|---|
 A similar Let L-410 |
|
| Accident summary | |
| Accident type | Loss of control on the final approach due to incorrect weight distribution |
| place | at Aldan Airport , Sacha , Russia
|
| date | August 26, 1993 |
| Fatalities | 24 |
| Survivors | 0 |
| Aircraft | |
| Aircraft type |
 Let L-410UVP-E
|
| operator |
Sacha Awia
|
| Mark |
RA-67656
|
| Departure airport |
Kutana , Sacha , Russia
|
| Stopover |
Uchur , Sakha , Russia
|
| Destination airport |
Aldan Airport , Sacha Russia
|
| Passengers | 22nd |
| crew | 2 |
| Lists of aviation accidents | |
The Sacha Awia flight 301 (flight number: K7301 ) was a domestic flight of the Russian airline Sacha Awia from Kutana to Aldan with a stopover in Uchur . On August 26, 1993, a Let L-410UVP-E had an accident on this flight , killing all 24 people on board. It is the worst incident involving a Let L-410 (as of October 2019).
plane
The affected machine was a Let L-410UVP-E made in Czechoslovakia . The L-410 prevailed against the Soviet Beriev Be-32 in a tender by the Council for Mutual Economic Aid (Comecon) and was therefore used by airlines from almost all Comecon member countries. The machine had the factory number 902509 and the serial number 25-09 . The machine was first delivered to Aeroflot on October 15, 1990 , where it went into service with the aircraft registration number CCCP-67656 . In 1993 the machine went into operation with the new registration number RA-67656 at Sacha Awia. The twin-engine regional airliner was equipped with two Walter M601 E turboprop engines .
Passengers and crew
There was a two-person crew on board, consisting of a flight captain and a first officer. Flight attendants were not provided on this regional flight. There were 22 passengers on board the flight segment to Aldan. The loaded luggage weighed 687 kilograms.
Flight plan
A regional flight within Sacha was carried out with the machine . Although the machine was overloaded by 623 kg at take-off, the first flight segment from Kutana to Uchur was flown without major problems. The accident occurred at the end of the second leg of the flight from Uchur to Aldan .
the accident
The pilots set the flaps on the approach to Aldan to 18 degrees, whereupon the machine went out of balance, but was initially able to stay in the air. The Let flew over the inner marker on the approach to Aldan at a flight speed of 196 km / h with a vertical speed of 4.8 m / s and a pitch angle of 6.6 degrees at a height of 68.7 m. After 8 seconds at a speed of 189 km / h, the crew began to extend the flaps further to a position of 42 degrees while idling. Suddenly the machine's angle of attack increased. The pilots began to initiate a missed approach . The captain pushed the control horn fully forward and held it in this position for the next 20 seconds. The airspeed continued to decrease sharply, while the angle of attack continued to increase. After the aircraft had reached an angle of attack of 42.5 degrees, it suddenly stalled . As a result, it fell to the ground over the left wing at a speed of 52 km / h. The collision with the ground took place with a pitch angle of 5.1 degrees, a roll angle of 21 degrees and a vertical speed of about 12 m / s. The machine crashed 273 meters from the runway and 160 meters to the left of the runway axis of Aldan Airport. All 24 people on board were killed in the accident.
root cause
At the time of take-off, the permissible take-off weight was 850 kg; at the time of approach to Aldan, the landing weight of the machine was exceeded by 550 kg. The aircraft was also heavily tail-heavy because of the 687 kilograms of luggage and cargo, around 400 kg had been loaded into the rear baggage compartment. On the approach to landing on Aldan, the aircraft's angle of attack had reached supercritical values due to the overload and the flap position. The events occurred as a result of gross violations of operating regulations, as the guide values for loading and weight distribution were not observed.
swell
- Accident report LET L-410 RA-67656 , Aviation Safety Network , accessed March 31, 2020.
- Accident report (Russian) on airdisaster.ru
- Company history and accident report (Russian) on russianplanes.net
Individual evidence
- ↑ Jochen K. Beek: Airplanes of the world 1919-2000 , Motorbuchverlag, ISBN 3-613-02008-4
Coordinates: 58 ° 36 ′ 40 ″ N , 125 ° 25 ′ 24 ″ E