ASN Wikibase Occurrence # 279838
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| Date: | Wednesday 29 June 2022 |
| Time: | 20:40 |
| Type: |  Mil Mi-8MTV-1 |
| Owner/operator: | Polar Airlines |
| Registration: | RA-25116 |
| MSN: | 95732 |
| Year of manufacture: | 1991 |
| Fatalities: | Fatalities: 0 / Occupants: 23 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Aldan region, Yakutia -
 Russia
|
| Phase: | Approach |
| Nature: | Fire fighting |
| Departure airport: | |
| Investigating agency: | MAK |
| Confidence Rating: |  Accident investigation report completed and information captured |
A Mil Mi-8 crashed in a wooded area while operating on behalf of the Aviation Forest Protection agency.
Four of the 23 on board were seriously injured.
At 09:58, the helicopter took off from Ust-May Airport. During the landing (without switching off the engines) at a fire site designated MP-12A, one paratrooper-firefighter was taken on board. During the second landing (without switching off the engines) at MP-13A, 18 paratroopers-firefighters and 600 kg of cargo were taken on board for delivery to the fire site.
After arrival at MP-20, the fire and possible landing sites were circled. As there was no suitable landing site, the pilot-observer and the pilot-in-command decided to drop 4 paratroopers-firefighters from a hover on descent devices to prepare the site.
In the process of hovering, the aircraft descended and collided with freestanding trees and then fell to the left side.
A localised fire, which occurred after the crash, was promptly extinguished.
Cause:
The accident with the Mi-8MTV RA-25116 helicopter occurred during an attempt to hover outside the influence zone of an air cushion with a flight weight exceeding the maximum permissible value for actual conditions, which, after the normal operation of the fuel supply limitation by the electronic regulators of the engines, led to a shortage of available power, a spontaneous descent and a collision with obstacles and terrain.
Exceeding the maximum permissible flight weight became possible due to the shortcomings of the existing procedures for determining and monitoring the helicopter load at the operational point when performing aerial work.
The lack of information in the helicopter flight manual and crew operating technology (standard operating procedures) on the procedure for monitoring the operation of the feed limitation and recommended actions did not allow the crew to timely recognize the situation and take measures to stop the hover and go around.
Accident investigation:
 |
|
Sources:
https://zapsib-sut.sledcom.ru/news/item/1702103/#
https://ria.ru/20220629/vertolet-1799027838.html
https://scnews.co.uk/33361/yakutia-to-provide-assistance-to-victims-of-mi-8-helicopter-crash-incidents/
https://www.mirror.co.uk/news/world-news/helicopter-crashes-after-suddenly-plunging-27365726
https://mak-iac.org/rassledovaniya/mi-8mtv-1-ra-25116-29-06-2022/
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 29-Jun-2022 13:55 | harro | Added |
| 29-Jun-2022 13:56 | harro | Updated [Category] |
| 30-Jun-2022 06:48 | gerard57 | Updated [Total occupants, Nature, Source, Damage, Narrative] |
| 30-Jun-2022 13:48 | gerard57 | Updated [Source] |
| 30-Jun-2022 19:24 | Hans Gruber | Updated [Source] |
| 03-Jul-2022 12:04 | harro | Updated [Embed code] |
| 04-Jul-2022 10:01 | Hirurg | Updated [Source] |
| 11-Sep-2023 06:27 | harro | Updated [[Source]] |
Corrections or additions? ... Edit this accident description
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