Don Enns, a regional manager at the independent Transportation Safety Board of Canada, told CTV and CP24 on Tuesday that "some sort of failure" inside one of the plane's two engines disrupted the airflow, causing part of the turbine section to fly out the back.

CNN: Engine malfunction caused plane debris to fall in Canada

The main call of bogus revolves around non-compliance among passengers and abject failure of enforcement in the plane.

ENGADGET: Editorial: Devices on planes -- either enforce the rules or change them

Testimony at the hearings also revealed that fatigue apparently contributed to the failure of Renslow and First Officer Rebecca Shaw to save the plane as it approached Buffalo Niagara International Airport.

CNN: FAA orders review of regional airlines' training