Transportation Safety Board of Canada
The accident was investigated by the Transportation Safety Board of Canada (TSB), which determined the cause of the accident to be an in-flight breakup cause by a rapid descent. However, no definite reason was found as to why the descent was initiated. An autopsy performed on the two pilots by the British Columbia Coroner Service revealed that pilot Brandt had a blood alcohol level of 0.24 percent, three times the legal limit for a driver.