Yes, that rings true - thanks, Astro14.It was a bit more subtle than that.
The fuel gauge system was inoperative, so the airplane was “drip sticked”, meaning, each tank was measured from below using a float on a stick, and the scale from that was translated into fuel weight using the Boeing 767-200 service manual.
The weight on the chart in that manual provided by Boeing was in lbs.
But the Canadian mechanics used metric, so they naturally assumed weight was in KG.
They serviced the plane up to the required weight, not realizing that the number was lbs, not KG.
The plane had just under half the required fuel. With no “gas gauge” that worked.
The Captain did a brilliant job gliding a 767 to Gimli.
Just to make sure I'm understanding this correctly, the refilling techs determined, based on float level, that the tanks contained x weight of fuel. That weight was actually pounds, but was assumed to be kg. Therefore, there was only about 45% of the amount of fuel that there was thought to be. (1 kg ~ 2.2 lbs, and 1 lb ~ 0 45 kg.)
On that basis, it was either decided that the tanks had enough fuel for the next leg, or, if the tanks were topped up, the amount of fuel added was inadequate, correct?
As is so often the case, there were the two errors in series that led to the near-disaster - the broken fuel gauge, and the assumption about the units of measurement. Strange, since Canada had gone fully metric less than 5 years before.
Do you know what, if any, changes were made to the refuelling protocol as a result?