Incident Overview

Date: Sunday 7 January 1968
Aircraft Type: de Havilland Canada DHC-3 Otter
Owner/operator: Canadian Armed Forces
Registration Number: 3674
Location: Lake Memphramagog, QC – ÿ Canada
Phase of Flight: Taxi
Status: Destroyed, written off
Casualties: Fatalities: 0 / Occupants: 2
Component Affected: SkiSki
Category: Accident
An Otter aircraft, during a navigation ski-training flight on Lake Memphramagog, sank after a ski broke through the ice, resulting in the loss of the aircraft.An Otter aircraft, during a navigation ski-training flight on Lake Memphramagog, sank after a ski broke through the ice, resulting in the loss of the aircraft.

Description

The Otter operated on a navigation ski-training flight. After two touch-and-go landings on the ice of Lake Memphramagog, the pilot landed. While taxying for take-off, one ski broke through the ice, which then gave way and the Otter sank. The two crew members evacuated. The investigation determined that the ice thickness was only four inches, and that the Unit had failed to determine that there was adequate ice thickness on the selected training areas.

Source of Information

https://www.dhc-3archive.com/DHC-3_32.html, http://www.ody.ca/~bwalker/RCAF_3650_3699_detailed.htmlhttps://www.dhc-3archive.com/DHC-3_32.html, http://www.ody.ca/~bwalker/RCAF_3650_3699_detailed.html

Primary Cause

Insufficient ice thickness assessment and failure to verify adequate ice thickness on the selected training areas.Insufficient ice thickness assessment and failure to verify adequate ice thickness on the selected training areas.

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