Adding Another Barrier Against Incorrect Takeoff Data
The account headed “Late Change Disrupts Preflight” (ASW, 9/10, p. 57) talks about an aircrew taking off with invalid takeoff data due to human error. Probably everybody knows a few more examples of this. I think that there is one more “slice of Swiss cheese” one should consider establishing to make this type of event less likely.
In order to calculate correct takeoff data and takeoff thrust settings, entry of the correct weights in the charts or computer programs is essential. Although there are multiple procedures in effect to ensure entry of valid weights, there is always the chance for human error — for example, taking wrong weights by accident, like in this case; mistyping the weights, like in Brisbane; or maybe the loaders providing a wrong measurement.
At present, if the crew uses wrong weights for calculation, and does not d…
