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DHC2, Squaw Lake Quebec Canada, 2005
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|On 1st September 2005, a DHC-2 Beaver, crashed near Squaw Lake, Quebec, Canada, following loss of control in poor weather and moderate to severe turbulence.|
|Actual or Potential
|Human Factors, Loss of Control, Weather|
|Aircraft||DE HAVILLAND CANADA DHC-2|
|Type of Flight||Public Transport (Passenger)|
|Take off Commenced||Yes|
|Approx.||11 nm northwest of Squaw Lake and 4 nm east of Elross Lake|
Procedural non compliance
|Tag(s)||Flight Control Error"Flight Control Error" is not in the list (Airframe Structural Failure, Significant Systems or Systems Control Failure, Degraded flight instrument display, Uncommanded AP disconnect, AP Status Awareness, Non-normal FBW flight control status, Loss of Engine Power, Flight Management Error, Environmental Factors, Bird or Animal Strike, ...) of allowed values for the "LOC" property.,|
|Tag(s)||En route In-cloud air turbulence,|
Low Level Windshear
|Damage or injury||Yes|
|Aircraft damage||Hull loss|
|Fatalities||Most or all occupants ()|
|Causal Factor Group(s)|
On 1st September 2005, a DHC-2 Beaver, crashed near Squaw Lake, Quebec, Canada, following loss of control in poor weather and moderate to severe turbulence.
The following is the synopsis from the official report published by the Transportation Safety Board of Canada:
"The float-equipped de Havilland DHC-2 Beaver…departed the outfitter base camp at Squaw Lake, Quebec, at 0925 eastern daylight time, with a passenger and a few supplies on board, for a round-trip visual flight rules (VFR) flight to two wilderness camps, Camp 2 and Camp Pons. The weather in Squaw Lake was suitable for visual flight at the time of take-off but was forecast to deteriorate later in the day. The pilot completed the flights to the two camps and on the way back to Squaw Lake, the weather forced the pilot to make a precautionary landing on Elross Lake, 15 nm27,780 m <br />27.78 km <br />91,141.732 ft <br /> northwest of Squaw Lake. At 1630, he reported to the company via high frequency (HF) radio that he intended to take off from Elross Lake, as there seemed to be a break in the weather. Rescue efforts were initiated in the evening when the aircraft did not arrive at the base camp. The aircraft was located at 1230 the following day, 4 nm7,408 m <br />7.408 km <br />24,304.462 ft <br /> from Elross Lake…The aircraft was destroyed by a post-impact fire. The pilot sustained fatal injuries."
The report makes the following statement regarding the cause and contributing factors:
"The pilot attempted to cross the mountain ridge in adverse weather, and the aircraft stalled at an altitude from which recovery was not possible. Loss of visual references, strong updrafts, moderate to severe turbulence and possible wind shear likely contributed to the onset of the aerodynamic stall."
- For further information on this particular incident, see the full TSB Accident Report