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Air transportation safety investigation A20W0016

The TSB has completed this investigation. The report was published on 12 May 2021.

Table of contents

Loss of pitch control on landing

Canadian Pacific Railway Company
Bombardier CL-600-2B16 (Challenger 605), C-GKCP
Calgary International Airport, Alberta

View final report

The occurrence

On 23 February 2020, the Canadian Pacific Railway Company Bombardier CL-600-2B16 (Challenger 605) (registration C-GKCP, serial number 5945) departed Palm Beach International Airport, Florida, United States, for Calgary International Airport, Alberta, with 3 crew members and 10 passengers on board.

During the descent into the greater Calgary area, the flight crew selected flaps 20 and immediately received a “FLAPS FAIL” caution message on the engine indication and crew alerting system. The flight crew requested and received delaying vectors to the east, and proceeded to complete the flaps fail procedure in the Quick Reference Handbook. The aircraft was then sequenced back in for a zero-flap landing on Runway 17R. The aircraft touched down at 1434 Mountain Standard Time. During the landing roll, maximum reverse thrust was selected and the aircraft’s pitch attitude increased to the point where the aircraft became partially airborne for a brief moment and the rear fuselage struck the runway. During the process of recovery from the nose-high attitude, the nose landing gear struck the runway hard. The landing roll was completed and the aircraft continued to the intended parking area. There were no injuries to any of the aircraft occupants although there was significant damage to the forward fuselage.

Safety communication


Air Safety Information Letter A20W0016-D1-L1: Challenger 605 Series Flap System Inspection Interval and Challenger CL60 Series Cross Fleet Product Improvement

Media materials

News release


TSB releases investigation report about a 2020 landing accident in Calgary, Alberta
Read the news release

Investigation information

Map showing the location of the occurrence


Photo of Jeremy Warkentin

Jeremy Warkentin joined the Transportation Safety Board of Canada (TSB) in 2017 as a Regional Senior Technical Investigator, in the Aviation Investigations Branch, at the regional office in Edmonton, Alberta.

Mr. Warkentin is a graduate of the British Columbia Institute of Technology’s Aircraft Maintenance Engineer (AME) program and has more than 20 years of aviation experience working for several fixed wing operations as a licensed Aircraft Maintenance Engineer, Quality Assurance Manager and Base/Production Manager. He holds both an M1 and M2 license, and has experience on aircraft ranging in size from the Cessna 152 to the Airbus A321.

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.