Crash of a Kalinin K-5 in Moscow: 2 killed

Date & Time: Sep 17, 1933 at 1055 LT
Type of aircraft:
Operator:
Registration:
CCCP-L538
Flight Type:
Survivors:
No
MSN:
25
YOM:
1931
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Aircraft flight hours:
203
Circumstances:
The airplane departed Moscow Airport at 0900LT on a cargo flight, carrying two crew members and a load of 212 kilos of various goods. Few minutes after takeoff, while cruising at an altitude of about 200-300 metres, the crew encountered vibrations and stability problems. The pilot decided to return to Moscow and initiated a descent. On approach, at a height of 150 metres, the airplane entered an uncontrolled descent and crashed. The mechanic was seriously injured and the pilot was killed. Less than an hour later, the mechanic died from his injuries.
Probable cause:
It was determined that the tail detached in flight following vibrations of unknown origin. Investigations were unable to determine the exact cause of the accident.

Crash of a Tupolev R-6 Limuzin in Poldasnia: 8 killed

Date & Time: Sep 5, 1933 at 0920 LT
Type of aircraft:
Operator:
Registration:
CCCP-J5
Flight Phase:
Survivors:
No
Schedule:
Moscow - Feodosia
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
6
Pax fatalities:
Other fatalities:
Total fatalities:
8
Circumstances:
En route from Moscow to Feodosia, Crimea, the crew encountered marginal weather conditions. As the visibility was too low, the pilot reduced his altitude to establish a visual contact with the ground when the airplane impacted a tree and crashed. All eight occupants were killed.

Crash of a Polikarpov AP in Polyany: 1 killed

Date & Time: Aug 25, 1933 at 1900 LT
Type of aircraft:
Operator:
Registration:
CCCP-A198
Survivors:
Yes
Schedule:
Polyany - Polyany
MSN:
3436
YOM:
1932
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
1
Aircraft flight hours:
164
Aircraft flight cycles:
920
Circumstances:
The airplane was engaged in a spraying mission in the area of Polyany, carrying one passenger and one pilot. On approach, the pilot completed several turns and the last one was relatively sharp with a 50° bank when the airplane stalled and crashed. The passenger was injured and the pilot was killed.

Crash of a Polikarpov U-2 in Kazan: 2 killed

Date & Time: Aug 18, 1933 at 1821 LT
Type of aircraft:
Operator:
Registration:
CCCP-S227
Flight Type:
Survivors:
No
Schedule:
Kazan - Kazan
MSN:
4359
YOM:
1933
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Aircraft flight hours:
25
Aircraft flight cycles:
122
Circumstances:
The crew departed Kazan Airport on a local flight. On short final, at a height of about 30-35 metres, the airplane collided with an Aeroflot Tupolev ANT-9 registered CCCP-L150 that was completing a local test flight. It appears that on final, the Polikarpov was flying above the ANT-9 and cut his track before the collision occurred. The Polikarpov dove into the ground and was destroyed. Both pilots were seriously injured and died two hours later. The Tupolev continued for few seconds before it crashed near the runway, coming to rest broken in two. All 11 occupants were slightly injured.
Probable cause:
It was determined that the collision was the consequence of a poor organization between the crew and the Kazan Airport Authorities as no proper procedures were in place at the time of the accident for such test flight. The pilot of the Polikarpov failed to bring attention to potential traffic and did not realize the presence of the second aircraft. On his side, the pilot of the ANT-9 was unable to see the Polikarpov flying above him due to the upper wings position.

Crash of a Tupolev ANT-9 in Kazan

Date & Time: Aug 18, 1933 at 1821 LT
Type of aircraft:
Operator:
Registration:
CCCP-L150
Flight Type:
Survivors:
Yes
Schedule:
Kazan - Kazan
MSN:
151
YOM:
1933
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
9
Pax fatalities:
Total fatalities:
0
Circumstances:
The three engine airplane departed Kazan on a local test flight, carrying nine passengers and two crew members, one pilot and one mechanic. After a local flight of about 13 minutes, the crew decided to return to the airport. On short final, at a height of about 30-35 metres, the airplane collided with a Polikarpov U-2 registered CCCP-S227. Operated by Osoaviakhima (Kazan Aero Club), the airplane was completing a local flight with two pilots on board. It appears that on final, the Polikarpov was flying above the ANT-9 and cut his track before the collision occurred. The Polikarpov dove into the ground and was destroyed. Both pilots were seriously injured and died two hours later. The Tupolev continued for few seconds before it crashed near the runway, coming to rest broken in two. All 11 occupants were slightly injured.
Probable cause:
It was determined that the collision was the consequence of a poor organization between the crew and the Kazan Airport Authorities as no proper procedures were in place at the time of the accident for such test flight. The pilot of the Polikarpov failed to bring attention to potential traffic and did not realize the presence of the second aircraft. On his side, the pilot of the ANT-9 was unable to see the Polikarpov flying above him due to the upper wings position.

Crash of a Polikarpov U-2 in Balashov: 2 killed

Date & Time: Aug 13, 1933 at 0717 LT
Type of aircraft:
Operator:
Registration:
CCCP-Sh480
Flight Type:
Survivors:
No
Schedule:
Balashov - Balashov
MSN:
2773
YOM:
1932
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Aircraft flight hours:
348
Circumstances:
The airplane departed Balashov on a local training flight, carrying one instructor and one cadet. On approach, at an altitude of about 250 metres, it collided with a second Aeroflot Polikarpov U-2. Registered CCCP-Sh90, this airplane was also completing a local training flight at Balashov with two crew members on board and just took off. Following the collision, both aircraft dove into the ground and crashed near the airfield, killing all four occupants, among them both instructors Butenko and Korovine.
Probable cause:
The instructor Korovine on board CCCP-Sh480 failed to observe sufficient attention on the potential traffic while approaching the airfield and committed serious violations during the circuit, resulting in the collision. The second instructor Butenko was blamed for the same reason. It was also determined that the pilot of CCCP-Sh480 was approaching the airport facing the sun rising, which affected his vision.

Crash of a Polikarpov U-2 in Balashov: 2 killed

Date & Time: Aug 13, 1933 at 0717 LT
Type of aircraft:
Operator:
Registration:
CCCP-Sh90
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Balashov - Balashov
MSN:
3853
YOM:
1932
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Aircraft flight hours:
49
Aircraft flight cycles:
118
Circumstances:
The airplane departed Balashov on a local training flight, carrying one instructor and one cadet. After takeoff, the pilot made a left turn then climbed to the altitude of about 250 metres when the aircraft collided with a second Aeroflot Polikarpov U-2. Registered CCCP-Sh480, this airplane was also completing a local training flight at Balashov with two crew members on board. Following the collision, both aircraft dove into the ground and crashed near the airfield, killing all four occupants, among them both instructors Butenko and Korovine.
Probable cause:
The instructor Korovine on board CCCP-Sh480 failed to observe sufficient attention on the potential traffic while approaching the airfield and committed serious violations during the circuit, resulting in the collision. The second instructor Butenko was blamed for the same reason. It was also determined that the pilot of CCCP-Sh480 was approaching the airport facing the sun rising, which affected his vision.

Crash of a Savoia-Marchetti S.55 near Volsk: 3 killed

Date & Time: Jul 12, 1933 at 1130 LT
Type of aircraft:
Operator:
Registration:
CCCP-N11
Flight Phase:
Survivors:
Yes
Schedule:
Sevastopol – Yeysk – Volsk – Sverdlovsk – Omsk – Novosibirsk – Krasnoyarsk – Irkutsk – Vitim – Yakutsk – Nogaevo – Cape Severny
MSN:
10526
YOM:
1933
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
3
Aircraft flight hours:
12
Aircraft flight cycles:
15
Circumstances:
The seaplane departed Sevastopol on a flight to Cape Severny with several en route stops, carrying one passenger (one journalist from the Komsomolskaya Pravda) and four crew members. On the leg from Yeysk to Volsk, while flying over the Volga River at a speed of 175-200 km/h and at a height of about 10-15 metres, the airplane encountered a cold front, lost altitude and crashed into the river, some 300 metres from the shore. Fishermen were able to rescue two crew members while three other occupants were killed.
Probable cause:
The accident was the consequence of the combination of a flight at a too low altitude and a subsequent impact with water due to particular local weather conditions.

Crash of a Polikarpov U-2 in Michurinsk: 1 killed

Date & Time: Jun 27, 1933 at 0610 LT
Type of aircraft:
Operator:
Registration:
CCCP-Sh566
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Michurinsk - Michurinsk
MSN:
3050
YOM:
1932
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Aircraft flight hours:
485
Aircraft flight cycles:
2572
Circumstances:
The pilot departed Michurinsk Airport on a local solo training flight. While flying at an altitude of about 700-750 metres, he initiated manoeuvres when control was lost. The airplane dove into the ground and crashed near the airfield. The pilot was killed.
Probable cause:
Loss of control after the pilot suffered a loss of orientation (spatial disorientation) due to his inexperience.

Crash of a Lockheed 5B Vega near Anadyr

Date & Time: Jun 15, 1933
Type of aircraft:
Registration:
NR869E
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
118
YOM:
1929
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
James Joseph Mattern was performing a second attempt to cross all Russia from/to the US via Siberia. En route, he encountered unknown technical problems and was forced to make an emergency landing some 80 km from Anadyr. The aircraft was damaged beyond repair and abandoned on site, and the pilot was slightly injured. This Vega was the second one of JJ Mattern and received the same registration NR869E as his first Vega that crashed in Belarus on July 6, 1932. While the first Vega NR869E had the MSN 069, the second NR869E received the MSN 118.
Probable cause:
Forced landing due to unknown technical problems.