gwillie;
Re,
"Perhaps the cause of the second is written on the bottom line of the first: Quote:
The Canadian TSB reported the airline conducts an investigation into the occurrence. "
Internal Safety Investigations done by the airline are usually effective and is the way SMS works in Canada and, I suspect, the U.S. The regulator has oversight responsibilities of course, (assuming the necessary resources are in place...) but in this kind of an incident an internal investigation is reasonable and warranted. Sometimes FOQA data helps in such investigations depending upon the agreements with pilots' associations. Regardless, the airline's safety policy and culture is non-punitive so getting to the bottom of why this happened is only a matter of information-gathering and time.