At the time of the incident, Canada's aviation sector was in the process of converting from Imperial units to the metric system. As part of this process, the new 767s being acquired by Air Canada were the first to be calibrated for metric units. The fueler reported that the density of jet fuel at the time was 1.77, which was in pounds/litre since other Air Canada aircraft used pounds. Pearson and Quintal both used the density of jet fuel in lb/L without converting to kg/L: