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Air transportation safety investigation A19W0105

The TSB has completed this investigation. The report was published on 29 July 2020.

Table of contents

Controlled flight into terrain

Alkan Air Ltd.
Cessna 208B Grand Caravan, C-FSKF
Mayo, Yukon, 25 NM ENE

View final report

The occurrence

At 1101 Pacific Daylight Time on 06 August 2019, the Alkan Air Ltd. Cessna 208B Grand Caravan aircraft (registration C-FSKF, serial number 208B0673) departed Rau Strip, Yukon, on a visual flight rules company flight itinerary to Mayo Airport, Yukon. The aircraft had 1 pilot, 1 passenger, and cargo on board. At 1113, the aircraft entered instrument meteorological conditions and struck rising terrain in a box canyon shortly after. The crash occurred approximately 25 nautical miles east-northeast of Mayo Airport, at an elevation of 5500 feet above sea level. The Canadian Mission Control Centre did not receive a signal from the aircraft’s 406 MHz emergency locator transmitter. Eyewitnesses from a nearby exploration camp arrived at the site after approximately 1 hour. Royal Canadian Mounted Police and emergency medical services arrived on site approximately 90 minutes after the accident. The pilot and passenger received fatal injuries. The aircraft was destroyed; there was a brief post-impact fire.

Media materials

News release


Pilot decision-making in poor weather contributed to fatal 2019 controlled flight into terrain accident near Mayo, Yukon
Read the news release

Deployment notice


TSB deploys a team of investigators following an accident near Mayo, Yukon

Edmonton, Alberta, 8 August 2019 – The Transportation Safety Board of Canada (TSB) is deploying a team of investigators following a fatal accident involving a Cessna 208 aircraft that occurred on 6 August 2019, near Mayo, Yukon. The TSB will gather information and assess the occurrence.

Investigation information

Map showing the location of the occurrence


Photo of Jonathan (Jon) Lee

Jonathan (Jon) Lee is the Western Regional Manager for the Transportation Safety Board of Canada (TSB) in Edmonton, Alberta. He has been an aircraft investigator for 19 years, and has been managing the Edmonton office for eight of those years. He has been involved in approximately 50 investigations. Mr. Lee has also participated in foreign investigations that involve Canadian aerospace products. Working with the National Transportation Safety Board (United States), the Aviation Safety Council (Taiwan), Aviation and Railway Accident Investigation Board (South Korea), and the Aviation Accident Investigation Board (Mongolia) has made Mr. Lee appreciate the importance of the TSB’s role in global aviation.

Before working in accident investigation, Mr. Lee gained industry experience as a pilot in operations ranging from regional airlines and transcontinental cargo to medevac and flight instruction. He has flown over 35 types of aircraft and has accumulated 6500 flight hours. He maintains a valid and current airline transport pilot license.

Class of investigation

This is a class 3 investigation. These investigations analyze a small number of safety issues, and may result in recommendations. Class 3 investigations are generally completed within 450 days. For more information, see the Policy on Occurrence Classification.

TSB investigation process

There are 3 phases to a TSB investigation

  1. Field phase: a team of investigators examines the occurrence site and wreckage, interviews witnesses and collects pertinent information.
  2. Examination and analysis phase: the TSB reviews pertinent records, tests components of the wreckage in the lab, determines the sequence of events and identifies safety deficiencies. When safety deficiencies are suspected or confirmed, the TSB advises the appropriate authority without waiting until publication of the final report.
  3. Report phase: a confidential draft report is approved by the Board and sent to persons and corporations who are directly concerned by the report. They then have the opportunity to dispute or correct information they believe to be incorrect. The Board considers all representations before approving the final report, which is subsequently released to the public.

For more information, see our Investigation process page.

The TSB is an independent agency that investigates air, marine, pipeline, and rail transportation occurrences. Its sole aim is the advancement of transportation safety. It is not the function of the Board to assign fault or determine civil or criminal liability.