From the news update quoting investigators:
The Boeing 747-200 was moving up the runway at 240 kilometres an hour before the crash -- at least 55 kilometres slower than it should have been.
Transportation Safety Board of Canada investigator Bill Fowler says the plane needed more thrust to get up to the speed required, given the runway it had available.
Fowler has said the jet used all but the first 60 metres of its runway during takeoff. But he has also said that under ideal circumstances, the shortened run would have given the aircraft more than enough room to take off.
The plane was loaded with 53,000 kilograms of seafood, along with lawn tractors and computer gear. A 747 has a payload capacity of about 60,000 kilograms.
Fowler says the fish cargo was not weighed at the airport before it was loaded on the plane in Halifax.
The TSB issued an advisory Friday on the proper weighing of cargos -- suggesting investigators believe the plane may have been overloaded.
However, Fowler refused to speculate that the jet was overloaded, saying all the information is not yet available.
The plane's damaged flight data recorder was recovered last week. Fowler has said it indicated the 747's four engines were functionally normally.
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