Russia

After take off from Makhachkala, the visibility was poor and the crew was following the railway track up to Grozny. But the pilot lost his orientation when the aircraft hit the slope of Mt Terski located near Gudermes. All five occupants were killed. At the time of the accident, weather conditions were below minima.

The crew was completing a cargo flight from Kuybyshev to Saratov-Razboyshchina Airport with a load of various goods for a total weight of 2,089 kilos. On approach to Saratov, the crew encountered poor weather conditions with a visibility limited to 800 metres due to fog. Despite below minima conditions, the captain decided to continue the approach and completed a last turn to join the glide when the aircraft stalled and crashed about 5 km from the airport, on the slope of the Korolyov Sad ravine, bursting into flames. The aircraft was destroyed and all six occupants were killed.

The crew was returning from Naryan Mar to Lakhta AFB following a maritime patrol flight in the Novaya Zemlya region. En route, the crew encountered poor weather conditions and the visibility was reduced due to fog. The pilot decided to gain height when the seaplane hit the top of a hill and crashed in flames some 2 km southeast of Lodka hill. While six crew members were killed instantly, the mechanic was slightly injured and walked for 12 days prior to find help in the small village of Kotkino. The crew was from the 44th Aviation Regiment of the White Sea Flotilla.

The aircraft left Chita-Cheryomushki Airport at 1210LT, carrying a delegation of eight Soviet officers who were returning to Moscow following an inspection of the Far East Air Force Unit. Some 52 minutes into the flight, the crew encountered poor weather conditions when the aircraft struck the slope of a mountain located in the region of Khilok. As the airplane failed to arrive at destination, SAR operations were conducted but eventually suspended on November 11, 1944 as no trace of the airplane nor the occupants was found. The wreckage was located in September 1945. All eight occupants were killed, among them General Vladimir Ivanovitch Artamonov.
Occupants:
Col Vladimir Ivanovitch Artamonov,
Col A. P. Naumov,
Col P. K. Pomortsev,
Lt Col P. A. Bogdanov,
Lt Col I. G. Kramarenko,
Lt J. C. Goetz,
Sgt Zhirnov,
Sgt Kazachenk.
Source: http://wikimapia.org/20707306/ru

Crashed somewhere in Russia in June 1944 (exact date unknown). Occupant fate unknown as well.

The aircraft crashed in unknown circumstances into the Kresta Bay, off Vel'Kal. All three crew members were killed.

Crashed in unknown circumstances while making a test flight near the Obozerski Airport, in the region of Plessetsk, some 200 km south of Arkhangelsk. All six crew members were killed.

The crew was performing a positioning flight from Moscow-Vnukovo to Moscow-Khodynka. Shortly after takeoff, the crew voluntarily shot down an engine for training purposes. As he was unable to restart the engine, the captain decided to return to Vnukovo. On final, probably due to a wrong approach configuration, the aircraft landed long and after touchdown, the captain decided to go around. But the aircraft went out of control, veered off runway, collided with a parked Bell P-39Q Airacobra before coming to rest in flames 85 meters further on. All five crew members were unhurt while both aircraft were destroyed by fire.

The crew was performing a supply mission from Kudrovo AFB in Leningrad to an area located behind the German lines. The aircraft went missing over German-held after a last contact was heard at 2235LT. No trace of the aircraft nor the crew was found.

Shortly after takeoff, while climbing to a height of 40 meters, the aircraft stalled, banked right and crashed in a huge explosion 200 meters from the boundary fence. All six occupants were killed. The aircraft was performing a cargo flight to Kuybyshev carrying a load of various goods consisting of studs, cord and gloves.