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Last updated: 20 October 2021
Status:Final
Date:Saturday 26 October 2019
Time:07:37
Type:Silhouette image of generic DH3T model; specific model in this crash may look slightly different
de Havilland Canada DHC-3T/M601 Turbine Otter
Operator:Blue Water Aviation Services
Registration: C-GBTU
MSN: 209
First flight: 1957
Total airframe hrs:16474
Engines: 1 General Electric H75-200
Crew:Fatalities: 1 / Occupants: 1
Passengers:Fatalities: 2 / Occupants: 2
Total:Fatalities: 3 / Occupants: 3
Aircraft damage: Destroyed
Aircraft fate: Written off (damaged beyond repair)
Location:Family Lake, Little Grand Rapids First Nation, MB (   Canada)
Phase: Approach (APR)
Nature:Domestic Non Scheduled Passenger
Departure airport:Bissett Water Aerodrome, MB, Canada
Destination airport:?
Narrative:
A float-equipped DHC-3T Turbine Otter operated by Blue Water Aviation Services, was conducting a flight from Bissett (CJY6), MB to Family Lake near Little Grand Rapids, MB with 1 pilot and 2 passengers and approximately 800 pounds of freight on board.
The purpose of the flight was to transport 2 contractors, their tools, and some roofing materials. It was the first of a series of flights planned for that day.
As the aircraft was turning final for the water at Family Lake the right wing became detached from the fuselage. The aircraft entered an uncontrolled descent and collided with the water surface. The pilot and 2 passengers sustained fatal injuries.

Probable Cause:

Findings as to causes and contributing factors
1. A fatigue fracture originated in the bolt hole bore of the right-hand wing lift strut’s upper outboard lug plate, and eventually led to an overstress fracture of the right-hand wing lift strut’s upper outboard and inboard lug plates during the left turn prior to the final approach.
2. The failure of the outboard and inboard lug plates led to the separation of the right-hand wing lift strut from the wing and, subsequently, the separation of the right wing from the aircraft.

Accident investigation:
cover
Investigating agency: TSB Canada
Status: Investigation completed
Duration: 1 year and 2 months
Accident number: A19C0138
Download report: Final report

Classification:
Wing failure
Loss of control

Sources:
» winnipeg.ctvnews.ca
» www.cbc.ca
» dhc-3archive.com


Follow-up / safety actions

TC issued 1 Airworthiness Directive

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This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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