R-66 RA-06205 20.01.2015

Accident date	20.01.2015
Investigation status
Aircraft registration number	RA-06205
Place of aircraft departure
Airport of departure
Intended destination
Intended Airport of arrival
Accident site	in the region of Tasganta locality of the Altai region
Latitude	49°33'03,66''
Longitude	088°57'51,54''
Aircraft type	Robinson R66
Serial №	0459
Aircraft operator	"Kustard" LLC
Aircraft owner	"Kustard" LLC
The date of the completion of the investigation (report)	18.02.2016
Number of fatalities	0
Victims accuracy
Degree of aircraft destruction	aircraft destroyed
Report	report_RA-06205.pdf (2.75 MB)
Aviation type	GA
Works type
Note

20 january 2015

Non-fatal accident with helicopter R-66 RA-06205 operated by "KUSTARD" LLC occurred near Tasganta locality, Altai Republic, RF. According to the available information 2 crew members and 2 passengers on board were not injured, the rotorcraft was burnt.

The Interstate Aviation Committee has assigned the Investigation team of this accident in accordance with the Russian Aviation Legislation. The Investigation team has started its work.

24 february 2016

The Investigation team of the Interstate Aviation Committee has completed the investigation of the accident with Robinson R-66 RA-06205 helicopter owned by "Kustard" LLC occurred on January 20, 2015 in the Republic of Altai (RF).

Most probably the accident with R-66 RA-06205 helicopter was caused by engine flameout in flight that resulted in rotor revolution loss (thrust loss) and helicopter ground impact.

Engine flameout most probably was caused by fuel outflow and fuel tank intake denudation during uncoordinated (with sideslip) right turn with large bank angles (possible with exceeding 60° limitation). During yawed flight the turn force which contributes to the fuel outflow emerges.

Contributing factor was significant wind flow and orographic turbulence influence on helicopter during take off at low altitude in a gorge where the pilot wasn't familiar with wind conditions.

The appropriate safety recommendations based on the investigation results were presented.