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| Date: | Saturday 28 June 2014 |
| Time: | 19:16 |
| Type: |  Robinson R66 |
| Owner/operator: | OOO Technodrome |
| Registration: | RA-1588G |
| MSN: | 0040 |
| Year of manufacture: | 2011 |
| Engine model: | Rolls-Royce RR300 |
| Fatalities: | Fatalities: 4 / Occupants: 4 |
| Other fatalities: | 0 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Apsheronsky District, Krasnodar Krai -
 Russia
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Gul`kevichi |
| Sochi | |
| Investigating agency: | MAK |
| Confidence Rating: |  Accident investigation report completed and information captured |
Crashed.
The most probable cause of the R-66 helicopter RA-1588G crash was the pilot-in-command’s abrupt control input (disproportionate cyclic stick movement) upon entering cloud conditions. The pilot did not have an instrument flight rules (IFR) rating, which led to the helicopter entering an unusual spatial position and weightlessness conditions, causing the main rotor blade hinges to strike the stops on the main gearbox mast—a phenomenon known as “mast bumping”—resulting in the in-flight breakup of the helicopter.
A contributing factor was the pilot’s failure to make a timely decision to return to the departure aerodrome or land on a suitable site when the weather conditions deteriorated below the established minimums.
Accident investigation:
 |
|
Sources:
http://23.mchs.gov.ru/operationalpage/emergency/detail.php?ID=29115_
http://23.mchs.gov.ru/operationalpage/emergency/detail.php?ID=29119_
https://mak-iac.org/russian/investigations/2014/r66_ra-1588g.html
http://lifenews.ru/news/135779
http://lifenews.ru/news/135789
http://www.airliners.net/photo/Robinson-R-66-Turbine/2165220/?sid=435706a01db6669604a20203d4d2939d
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Jun-2014 20:42 | Hans Gruber | Added |
| 28-Jun-2014 21:16 | krasatpi | Updated [Time, Source, Narrative, ] |
| 29-Jun-2014 04:33 | Vaclav Kudela | Updated [Registration, Cn, Source, ] |
| 29-Jun-2014 17:33 | krasatpi | Updated [Registration, Cn, Total fatalities, Total occupants, Source, ] |
| 30-Jun-2014 09:04 | Anon. | Updated [Operator, ] |
| 01-Jul-2014 06:08 | Hans Gruber | Updated [Operator, Source, ] |
| 08-Jul-2014 07:34 | Anon. | Updated [Operator, Departure airport, Destination airport, ] |
| 12-Jan-2015 12:17 | Anon. | Updated [Cn, Operator, ] |
| 16-Oct-2025 18:16 | ASN | Updated [Time, Cn, Operator, Nature, Narrative, Accident report, ] |
Corrections or additions? ... Edit this accident description
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