R-44 RA-04142 31.07.2012

Accident date	31.07.2012
Investigation status
Aircraft registration number	RA-04142
Place of aircraft departure	п.п. "Шумак"
Airport of departure
Intended destination	п.п. "Саган-Сайр"
Intended Airport of arrival
Accident site	район п.п. "Саган-Сайр", Тункинский район, Республика Бурятия
Latitude	51°58,571' СШ
Longitude	101°23,123' ВД
Aircraft type	R-44 Clipper II
Serial №	11956
Aircraft operator	НП "Байкальский авиационный клуб"
Aircraft owner	НП "Байкальский авиационный клуб"
The date of the completion of the investigation (report)	19.03.2013
Number of fatalities	0
Victims accuracy
Degree of aircraft destruction	aircraft substantially damaged
Report	report_ra-04142.pdf (1.8 MB)
Aviation type	Commercial
Works type
Note

21 march 2013

     The Interstate Aviation Committee Investigation team has completed the investigation of the accident with Robinson R-44 Clipper II RA-04142 helicopter owned by "Baikal aviation club" occurred in the Republic of Buryatia (RF) on July 31, 2012.
     The accident with Robinson R-44 Clipper II RA-04142 helicopter was caused by rotor speed decay below minimum values resulted in emergency landing and helicopter roll-over.
The Investigsation team couldn'r determine rorot speed decay cause due to lack of data recorders on board.
      Most probably speed decay was caused by degradation of piloting technique and left out of consideration the meteorological and orographic features of Sagan Sair landing site by PIC.
      According to provided data PIC wasn't trained for landing on sites selected while in flight at the altitudes above 1000 m.
      Appropriate safety recommendations based on the investigation results were developed.