Khantia-Mansia okrug | Bureau of Aircraft Accidents Archives

While taking off from Khanty-Mansiysk Airport, the single engine airplane encountered difficulties to gain height. With an insufficient speed, it struck trees located past the runway end, stalled and crashed. All 35 occupants escaped, some of them were injured, and the aircraft was damaged beyond repair.

Probable cause:

The crew elected to takeoff with 33 passengers on board while the AN-2 is not certified to carry so much passengers. It was determined that the total weight of the aircraft was well above the MTOW at the time of the accident. In such conditions, it was not possible for the crew to takeoff.

Crash of an Antonov AN-12B in Surgut: 7 killed

Date & Time: Jan 31, 1971 at 0441 LT

Type of aircraft:

Antonov AN-12

Operator:

Registration:

CCCP-12996

Flight Phase:

Landing (descent or approach)

Flight Type:

Cargo

Survivors:

Site:

Plain, Valley

Schedule:

Tyumen - Surgut

MSN:

00 347 403

YOM:

1970

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

391

Circumstances:

The airplane was completing a cargo flight from Tyumen to Surgut, carrying one passenger, six crew members and a load of 12 tons of herring from the Pacific. On final approach by night, at an altitude of 400 meters and a speed of 330 km/h, the captain requested 'flaps 15' when the airplane became unstable and rolled left and right. Few seconds later, the airplane entered a nose down attitude, reached the speed of 395 km/h and crashed in a left bank of 90° into an icy lake located 13,6 km from the runway threshold. The aircraft was totally destroyed and all sven occupants were killed.

Probable cause:

Loss of control caused by an excessive accumulation of ice on wing tips. The following factors were considered as contributing:
- Severe icing conditions,
- Misuse of the de-icing systems by the crew, especially with regard to air bleeding of the engines.

Crash of an Antonov AN-12B in Surgut: 14 killed

Date & Time: Jan 22, 1971 at 2136 LT

Type of aircraft:

Antonov AN-12

Operator:

Registration:

CCCP-11000

Flight Phase:

Landing (descent or approach)

Flight Type:

Cargo

Survivors:

Site:

Plain, Valley

Schedule:

Omsk - Surgut

MSN:

5 3 436 10

YOM:

1965

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

5626

Aircraft flight cycles:

2578

Circumstances:

The aircraft was completing a cargo flight from Omsk to Surgut, carrying two passengers, a crew of 12 (among them six reserve members) and a load of 12 tons of various construction equipments. While approaching Surgut Airport by night and icing conditions, at an altitude of 400 meters and a speed of 330 km/h, the pilot lost control of the airplane that crashed in flames 15 km short of runway. The aircraft was destroyed and all 14 occupants were killed.

Probable cause:

There were severe icing conditions at the time of the accident and the crew activated all de-icing equipment. Nevertheless, it appears that following the failure of a valve, the de-icing equipment was inoperative. An excessive accumulation of ice on the fuselage, the wings and all four engines caused the loss of control.

Crash of an Antonov AN-12B in Beryozovo

Date & Time: Feb 26, 1970

Type of aircraft:

Antonov AN-12

Operator:

Registration:

CCCP-12966

Flight Phase:

Landing (descent or approach)

Flight Type:

Scheduled Revenue Flight

Survivors:

Yes

Site:

Airport (less than 10 km from airport)

MSN:

9 3 465 01

YOM:

1969

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Circumstances:

Following an approach in a limited visibility due to thick fog, the airplane landed hard and came to rest. There were no casualties but the aircraft was later considered as damaged beyond repair.

Probable cause:

Misjudgement on part of the crew who failed to realize the distance with ground on final approach.

Crash of an Antonov AN-24B in Nizhnevartovsk: 24 killed

Date & Time: Oct 13, 1969 at 1727 LT

Type of aircraft:

Antonov AN-24

Operator:

Registration:

CCCP-47772

Flight Phase:

Landing (descent or approach)

Flight Type:

Scheduled Revenue Flight

Survivors:

Yes

Site:

Airport (less than 10 km from airport)

Schedule:

Tyumen – Surgut – Nizhnevartovsk

MSN:

79901405

YOM:

1967

Flight number:

SU227

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

2756

Aircraft flight cycles:

2298

Circumstances:

The crew started the approach to Nizhnevartovsk Airport by night and marginal weather conditions. Due to erroneous calculations, the aircraft was not properly aligned on the approach path and the captain decided to make a go-around. Six minutes later, he initiated a second approach. On short final, ATC asked the pilot if he has the runway in sight. As the answer was positive, the crew was cleared to land. Less than a minute later, the airplane struck tree tops, stalled and crashed in flames in a wooded area located 1,092 meters short of runway threshold. 32 occupants were injured while 24 others were killed, among them the copilot and a flight attendant.

Probable cause:

It was determined that the propellers went inadvertently into reverse when the crew activated the engine de-icing system. It was later discovered during investigations that there was a conception error on this type of aircraft between the de-icing systems and the thrust reversal systems that could activate simultaneously. Nevertheless, when control was lost, the flaps were deployed in an angle of 17° instead of 38° as prescribed, which was considered as a contributing factor.

Crash of an Antonov AN-24 in Khanty-Mansiysk: 43 killed

Date & Time: Mar 20, 1965 at 1313 LT

Type of aircraft:

Antonov AN-24

Operator:

Registration:

CCCP-46764

Flight Phase:

Landing (descent or approach)

Flight Type:

Scheduled Revenue Flight

Survivors:

Yes

Site:

Airport (less than 10 km from airport)

Schedule:

Tyumen - Khanty-Mansiysk

MSN:

47301301

YOM:

1964

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

580

Aircraft flight cycles:

573

Circumstances:

On final approach to Khanty-Mansiysk Airport, the crew failed to realize his altitude was insufficient when the airplane struck a snow covered field. It bounced then crashed in flames short of runway threshold. Four crew members were seriously injured while 43 other occupants were killed. The aircraft was destroyed.

Probable cause:

Possible wrong approach configuration and errors in the piloting techniques, expressed in an inaccurate determination of the airplane's altitude during the final stage of the approach.

Crash of a Polikarpov PR-5 in Samarovo: 7 killed

Date & Time: Feb 11, 1941 at 1142 LT

Type of aircraft:

Polikarpov PR-5

Operator:

Registration:

CCCP-L3374

Flight Phase:

Flight

Flight Type:

Scheduled Revenue Flight

Survivors:

Site:

Plain, Valley

Schedule:

Tyumen - Samarovo

MSN:

268

YOM:

1940

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

130

Circumstances:

The airplane departed Tyumen-Plekhanovo Airport on a schedule service to Samarovo (now Khanty-Mansiysk), carrying one pilot and six passengers, four adults and two children. Approaching Samarovo, weather conditions deteriorated with snow falls reducing the visibility below one km. The pilot overflew Samarovo without any visual contact and continued until weather conditions improved. At this time, the pilot decided to return to Samarovo despite the fact that the weather was still bad. Approaching from the north, he attempted to land in a pasture when he lost control of the airplane that crashed 15 km north of Samarovo. All seven occupants were killed.

Probable cause:

The pilot deliberately decided to return to Samarovo for landing despite poor weather conditions.
The following contributing factors were identified:
- The weather bulletin transmitted to the pilot was expired and did reflect the actual weather conditions at destination,
- Absence of control points on the route Tobolsk - Samarovo,
- The pilot's lack of experience and training in instrument flights.