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TSB Says Cause of Toronto Delta Crash Still Undetermined One Year Later

Investigators detail completed wreckage tests, recorder analysis, weather review, plus simulator exercises ahead of a draft final report.

Overview

  • TSB says the probe remains in the examination and analysis phase with no timeline provided for the final report.
  • Work to date includes metallurgical examination of the landing gear and right wing, analysis of flight-data and cockpit-voice recorders, and review of specific wind data.
  • Simulator exercises assessed the approach profile, speeds and thrust settings, with analysis of those runs still ongoing.
  • The March 2025 preliminary report noted a high rate of descent and a hard touchdown that broke the landing gear, without assigning cause.
  • Delta Flight 4819, a Bombardier CRJ-900 from Minneapolis with 80 aboard, flipped and caught fire at Pearson; all survived and 21 people were taken to hospital.