Jonathan Cerreta Chemistry "Crash Course in Density"         As flight 143, a twin engine 767, was passing over Red Lake on its was to Edmonton, Canada, the left front fuel pump warning light went on. There were a few possibilities for this to happen, such as the fuel pump failing, a fuel line clogging, or a empty fuel tank. The former two were easily dealt with, since the plane could fly without one fuel pump. However, the last …showed first 75 words of 425 total…

…showed last 75 words of 425 total…All they needed to know was how many kilograms were in a liter. Someone said 1.77, and they calculated the value they needed. However, the conversion of 1.77 was not Kilograms per liter, but pounds per liter. The actual value it .803. They were off by more than 50%. This problem would have been avoided if they had kept track of the units during the conversion. That is why it is always important to keep track of the units.