Let us go back. If I understand correctly, in the case of the accident that occurred in Lac-Mégantic, the brakes that had been applied loosened or were released, and I believe that was due to the engine. Something happened that caused the brakes to be released, and the train to start moving because the handbrakes had not been applied, and they are hydraulic brakes, if I understand properly.
On December 10th, 2024. See this statement in context.