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View Diary: Measurement as a Way to Understand the World (121 comments)

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  •  Per wikipedia... (4+ / 0-)
    Recommended by:
    RiveroftheWest, BYw, foresterbob, kyril

    Captain Pearson reproduced the same equation/calculation, using the same wrong density constant, which put them in the air with considerably less than 1/2 the fuel they intended. The constant they used, 1.77 lbs/l, was printed on the refueling sheet they used. The constant they should have used, however, was 0.803 kg/l. The 767 was the first Air Canada aircraft to use metric units, so there was considerable opportunity for confusion.

    This was complicated a bit by the fact that the tanks were already partially filled, so there were additional computations. In any event, they added considerably less fuel than they should have.

    Whether the ground crew did the wrong calculations or not (Air Canada did suspend three ground crew, as well as the pilots), the pilots were responsible for ensuring -- through whatever means (incl. dipsticks after fueling) -- that the airplane had sufficient fuel before takeoff.

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