Cessna U206F and Robinson R44 mid-air collision near Istra, Ru, August 8, 2015
On August 8, 2015 at about 5:08 pm local time, 2 aircraft, Cessna U206F (RA67523) and Robinson R44 (RA04383), were involved in a mid-air collision near Istra. 9 people were killed.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- August 8, 2015 · about 5:08 pm local time
- Place
- Istra, Russia
- Type
- Accident · mid-air collision
- Injuries
- 9 people were killed.
- Weather
- not recorded
- Aircraft 1
- Cessna U206F · all U206Fs on the register
- Registration
- RA67523 · no longer on the register · serial U20603346
- Damage
- Destroyed
- Flight
- Flight of an unrecorded kind · non-U.S. private rules
- Aircraft 2
- Robinson R44 · all R44s on the register
- Registration
- RA04383 · no longer on the register · serial 1916
- Damage
- Destroyed
- Flight
- Flight of an unrecorded kind · non-U.S. private rules
The NTSB's narrative for the Cessna U206F preliminary · quoted from the NTSB record
On August 8, 2015, at 1708 universal coordinated time, a Cessna U206F airplane, Russian registration RA- 67523 registered to a private owner, and a Robinson R44 II helicopter, Russian registration RA- 04383, registered to a private owner, collided while maneuvering over the Istra Reservoir, in Istra, Russia. Both aircraft impacted the waters of the reservoir and were destroyed. The pilot and 4 passengers in the airplane, and the pilot and 3 passengers in the helicopter, were all fatally injured. This investigation is under the jurisdiction of the Government of the Russia. Further information can be obtained from: Interstate Aviation Committee 22/2/1 Bolshaya Ordynka Str. Moscow, 119017, Russia mak@mak.ru This report is for informational purposes, and contains only information released by the Russian Federation.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The NTSB's narrative for the Robinson R44 preliminary · quoted from the NTSB record
On August 8, 2015, at 1708 universal coordinated time, a Cessna U206F airplane, Russian registration RA- 67523 registered to a private owner, and a Robinson R44 II helicopter, Russian registration RA- 04383, registered to a private owner, collided while maneuvering over the Istra Reservoir, in Istra, Russia. Both aircraft impacted the waters of the reservoir and were destroyed. The pilot and 4 passengers in the airplane, and the pilot and 3 passengers in the helicopter, were all fatally injured.This investigation is under the jurisdiction of the Government of the Russia. Further information can be obtained from: Interstate Aviation Committee 22/2/1 Bolshaya Ordynka Str. Moscow, 119017, Russia mak@mak.ru This report is for informational purposes, and contains only information released by the Russian Federation .
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record for the Cessna U206F from the NTSB's investigation tables, in plain English
What happened, in order
- Midair collision during maneuvering defining event
Pilot
- Seat: left
- Injury: fatal
The aircraft
- Last inspection: inspection type not recorded
- Maximum gross weight: 3,600 lb
- Seats: 6
- Landing gear: fixed
- Engine: Continental IO-520-DF (piston); 0 hours total
- Not recorded
Weather at the time
- Temperature: 0°F (-18°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 4 |
The factual record for the Robinson R44 from the NTSB's investigation tables, in plain English
What happened, in order
- Midair collision during maneuvering defining event
Pilot
- Injury: fatal
The aircraft
- Maximum gross weight: 2,400 lb
- Seats: 4
- Landing gear: fixed
- Engine: Lycoming O-540 (piston); 0 hours total
- Not recorded
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 3 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.