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Air transportation safety investigation A18O0150

The TSB has completed this investigation. The report was published on 02 May 2019.

Table of contents

Mid-air collision

Cessna 150G, C-FGMZ (privately owned)
NLG Air Inc.
Piper PA-42 Cheyenne III, C-FCSL
Ottawa/Carp Airport, Ontario, 1.3 nm S

View final report

The occurrence

On , at about 1010 EST, two aircraft collided near the Carp Airport located west of Ottawa, Ontario. The first aircraft was a Cessna 150 with one person on board who was fatally injured. The second aircraft, a Piper PA-42 (Cheyenne III) with two occupants on board, was able to fly to the Ottawa Macdonald–Cartier International Airport, where it landed at about 1030 EST.

Media materials

News release


Investigation report: November 2018 mid-air collision near Ottawa/Carp Airport, Ontario
Read the news release

Deployment notice


SB deploys a team of investigators to the site of a mid-air collision near Ottawa, Ontario

The Transportation Safety Board is deploying a team of investigators to the site of a mid-air collision near Ottawa, Ontario. The TSB will gather information and assess the occurrence.

Investigation information

Map showing the location of the occurrence


Photo of Mathieu L’Ecuyer

Mathieu L'Ecuyer joined the TSB’s Air Investigations Branch in 2018 as a Senior Technical Investigator in the Quebec Region. During his career, Mr. L’Ecuyer worked as an aircraft maintenance engineer, and as a team leader and supervisor in the industry, with experience on various types of aircraft including the Boeing 757, Airbus A320 and Bombardier CRJ-200. Prior to joining the TSB, M. L’Ecuyer worked for an aviation insurance adjusting firm as a claims adjuster and regional manager.


  Download high-resolution photos from the TSB Flickr page.

Class of investigation

This is a class 4 investigation. These investigations are limited in scope, and while the final reports may contain limited analysis, they do not contain findings or recommendations. Class 4 investigations are generally completed within 220 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.