ASN Wikibase Occurrence # 188590
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| Date: | Friday 8 July 2016 |
| Time: | |
| Type: |  Robinson R-44 |
| Owner/operator: | LLC Fort-Ross |
| Registration: | RA-04371 |
| MSN: | 2157 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Krasnoyarsk, river Kazyrsuk -
 Russia
|
| Phase: | En route |
| Nature: | Illegal Flight |
| Departure airport: | |
| Investigating agency: | MAK |
| Confidence Rating: |  Accident investigation report completed and information captured |
SAR was started after resceiving of ELT signal. The helicopter was found abandoned at the bottom of a gorge, laying on its side.
It was an unregistered flight.
Most probably, the R‑44 RA-04371 accident occurred while the forced landing in a mountain area was being performed. This forced landing was needed because the power for continuing a climb along the upgoing terrain was not enough.
The contributing factors were followings:
- best climbing speed was neither achieved nor maintained;
- decision for flight was made without considering that the flight had to be conducted in the mountain area with the takeoff mass that at some fragments of route didn't provide the helicopter with a hovering possibility even in ground effect;
- timely measures were not taken for the turn at 180°, considering that the actual width of ravine at the accident site was 300 m that didn't meet the minimum required by FAP-128 (FAP is Russian analog of FAR), which is 500 m;
- possible influence of turbulence and downdrafts while approaching the saddle from downwind, considering that at the accident site there were no conditions shown for the downdrafts' originating.
Accident investigation:
 |
|
Sources:
http://24.mchs.gov.ru/operationalpage/operational/item/3866969/
https://mak-iac.org/rassledovaniya/robinson-r-44-ra-04371-08-07-2016
http://en.news-4-u.ru/hard-landing-near-krasnoyarsk-helicopter-rescuers-found-at-the-bottom-of-the-gorge.html
https://life.ru/t/%D0%BD%D0%BE%D0%B2%D0%BE%D1%81%D1%82%D0%B8/874798/propavshii_v_krasnoiarskom_kraie_viertoliot_robinson_vyshiel_na_sviaz
https://saon.ru/forum/viewtopic.php?f=21&p=184367&sid=964babb944e588f0a0ddf23fc992d45f
https://mak-iac.org/upload/iblock/6b0/report_ra-04371.pdf
Images:
Photo: MAK
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Jul-2016 08:50 | gerard57 | Added |
| 10-Jul-2016 10:42 | Hans Gruber | Updated [Source] |
| 11-Jul-2016 13:44 | Kurt090 | Updated [Registration, Source, Narrative] |
| 15-Jul-2016 14:30 | Anon. | Updated [Cn] |
| 04-Aug-2016 10:27 | Hans Gruber | Updated [Date, Operator, Total occupants, Source] |
| 09-Aug-2020 16:13 | KagurazakaHanayo | Updated [Source, Narrative] |
| 09-Aug-2020 16:15 | harro | Updated [Photo, Accident report, ] |
Corrections or additions? ... Edit this accident description
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