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Air transportation safety investigation A19Q0128

The TSB has completed this investigation. The report was published on 10 December 2020.

Table of contents

Loss of control and collision with terrain

Beechcraft Bonanza V35B, N3804X
Senneterre, Quebec, 7 NM NE

View final report

The occurrence

On , at 1555 Eastern Daylight Time, the Beechcraft Bonanza V35B aircraft (registration N3804X, serial number D-10358) departed Wittman Regional Airport, Wisconsin, United States, for a daytime visual flight rules flight to Danbury Municipal Airport, Connecticut, United States, with only the pilot on board. Shortly after takeoff, the aircraft began to deviate north of the planned route and subsequently into Canadian airspace. At 1912, while in the vicinity of a line of rain showers, thunderstorms, and lightning, the aircraft entered a right turn, descended rapidly and collided with terrain approximately 7 nautical miles northeast of Senneterre, Quebec.

At 2331, the Joint Rescue Coordination Centre in Trenton, Ontario, was notified of a missing aircraft and initiated search and rescue operations. The accident site was found 4 days later, on 02 August 2019. The pilot was fatally injured. The aircraft was destroyed. There was no post-impact fire. No signal was detected from the aircraft’s emergency locator transmitter.

Media materials

News release


Fatal collision with terrain highlights the risks of continued visual flight rules flights in adverse weather conditions
Read the news release

Investigation information

Map showing the location of the occurrence


Photo of Jean-Pierre (Jeep) Régnier

Jean-Pierre (Jeep) Régnier is a senior investigator, Standards and Quality Assurance, with the Air Investigations Branch at the TSB head office in Gatineau. He has over 30 years of aviation experience, including 27 years in military aviation in the Royal Canadian Air Force (RCAF) as an officer and a helicopter pilot. During those 27 years in the RCAF, he worked as an accident investigator for 5 years. Mr. Régnier gained his flight experience on the CH-124 Sea King and Bell 206 Jet Ranger helicopters. He earned a master’s degree in safety and accident investigation from Cranfield University, United Kingdom, and joined the TSB in 2015.

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.