Bureau de la sécurité des transports
The dissenting report led to delays in changes to de-icing procedures, and a thin layer of ice caused the deadly crash of Air Ontario Flight 1363 in Canada in 1989. In response to lack of confidence in accident investigations by the CASB, the government of Canada shut down the board in 1990, replacing it with an independent, multi-modal investigative agency – the Transportation Safety Board of Canada.