Crash of a PZL-Mielec AN-2TP near Vilyuisk

Date & Time: Aug 16, 2013 at 1345 LT
Type of aircraft:
PZL-Mielec AN-2
Operator:
Registration:
RA-01419
Flight Phase:
Flight
Flight Type:
Scheduled Revenue Flight
Survivors:
Yes
Site:
Plain, Valley
Schedule:
Vilyuisk - Kyubeinde-Ugulet
MSN:
1G230-59
YOM:
1988
Flight number:
PI9977
Location:
Vilyuisk
Republic of Yakutia (Sakha)
Country:
Russia
Region:
Asia
Crew on board:
2
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
0
Captain / Total flying hours:
3973
Captain / Total hours on type:
480.00
Copilot / Total flying hours:
374
Copilot / Total hours on type:
52
Aircraft flight hours:
7587
Aircraft flight cycles:
10148
Circumstances:
Few minutes after takeoff from Vilyuisk Airport, on a schedule service (flight n° PI9977) to Kyubeinde-Ugulet, while cruising at an altitude of about 400 metres, the engine overheated and lost power while the oil pressure dropped. The crew decided to return to Vilyuisk when the engine failed shortly later. The captain attempted an emergency landing in a swampy area located 26 km northwest of Vilyuisk (at N63°54.584" E121°18.048"). The main wheels got stuck in soft ground, the engine was ripped off, and the aircraft came to rest, bursting into flames. Both pilots and all 9 passengers escaped uninjured and the aircraft was totally destroyed by fire.
Probable cause:
The accident with An-2Т RA-01419 aircraft was caused by emergency landing at the landing place in marsh area selected from air that resulted in main landing gear dipping in soft ground, dynamic pitch-down moment followed by engine ground impact and fuselage separation along engine mounting fitting, airframe structure and gear damage. Gasoline pipeline destruction during engine separation from aircraft frame and gasoline ingestion on the hot parts of power unit caused fire which almost completely destroyed the aircraft. Wrong PIC's actions who didn't turn off ignition and shut off fuel before aircraft landing could contribute to the fire. The emergency landing at the landing place selected from air was caused by oil temperature increase and pressure drop below specified by the aircraft FOM values in flight. It wasn't possible to determine the cause of temperature increase and oil pressure drop due to engine component substantial damage during fire.
Final Report:

Crash of a Lisunov LI-2 near Namtsev: 20 killed

Date & Time: Dec 27, 1951 at 0426 LT
Type of aircraft:
Lisunov LI-2
Operator:
Registration:
CCCP-L4228
Flight Phase:
Flight
Flight Type:
Scheduled Revenue Flight
Survivors:
No
Site:
Plain, Valley
Schedule:
Yakutsk – Vilyuisk
MSN:
18421601
YOM:
1945
Location:
Namtsev
Republic of Yakutia (Sakha)
Country:
Russia
Region:
Asia
Crew on board:
6
Crew fatalities:
Pax on board:
14
Pax fatalities:
Other fatalities:
Total fatalities:
20
Aircraft flight hours:
4429
Circumstances:
On a flight from Yakutsk to Vilyuisk when the crew selected fuel supply from the left rear tank but forgot to switch to another tank when the left rear tank ran empty. Both engines stopped 31 minutes into the flight so the crew tried to make an emergency landing in the valley of the river Taras located near Namtsev, about 90 km north of Yakutsk. Unfortunately, the crew set the propellers on high pitch and lowered the landing gear too early so the aircraft did not make it to the valley, stalled and crashed into a wooded area some 200 meters from an open area. All 20 occupants were killed.
Probable cause:
Engine failure caused by a fuel exhaustion due to poor management of the fuel supply system on part of the crew. The following factors were considered as contributory:
- Poor flight organization,
- Poor crew coordination,
- Several wrong decisions were taken by the flying crew during flight.

Crash of a Lisunov LI-2 in Vilyuisk: 2 killed

Date & Time: Aug 12, 1951 at 0702 LT
Type of aircraft:
Lisunov LI-2
Operator:
Registration:
CCCP-L4314
Flight Phase:
Landing (descent or approach)
Flight Type:
Scheduled Revenue Flight
Survivors:
Yes
Site:
Airport (less than 10 km from airport)
Schedule:
Vilyuisk - Yakutsk
MSN:
18427409
Location:
Vilyuisk
Republic of Yakutia (Sakha)
Country:
Russia
Region:
Asia
Crew on board:
5
Crew fatalities:
Pax on board:
11
Pax fatalities:
Other fatalities:
Total fatalities:
2
Circumstances:
Shortly after takeoff from Vilyuisk Airport, while climbing, the left engine failed. The crew was able to shut down the engine and to feather the propeller and decided to return to the airport for a safe landing. After completing a circuit, the airplane was approaching the airfield when it stalled and crashed in a field. Two passengers were killed while 14 other occupants were injured. The aircraft was destroyed.
Probable cause:
Failure of the left engine after liftoff due to a technical problem on the regulator. However, it was determined that the crew failed to take the appropriate actions and due to a lack of coordination, completed the approach in a wrong configuration with a too low speed, causing the aircraft to stall. A recovery was impossible due to an insufficient distance between the airplane and the ground. It appears that the captain and the second pilot who was acting as an instructor on this flight and was seating in the right seat did not have sufficient skills to operate in such situation with one engine inoperative.
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