The investigation report concluded that the crew could not reasonably have been expected to recognize the anomalously low speed sooner or intervene more effectively.
Using the passenger and baggage figures from the ground handling company, and the weather information from the ATIS, each pilot completed weight and balance, and performance calculations independently on his EFB.
At some point during the cockpit preparation, [the first incorrect] figure of -47 °C was entered into the FMC as the outside air temperature (OAT).As the aircraft departed Runway 07, the crew noticed unusually slow acceleration as well as a low climb rate, a fact noted by witnesses on the ground.
Usage of inaccurate takeoff data can be fatal, as it can lead to runway overruns and possibly collisions with obstructions, as happened in a 2004 accident at Halifax Airport in which seven people died.
The Report explored various human-factors aspects of the incident, concluding that the pilots could not reasonably have been expected to respond more quickly to the developing situation, either before or after becoming airborne.