Be very careful how you make unfounded statements based on erroneous information such as:
The fact that most airplanes are equipped with configuration warning equipment (i.e. a warning would have gone off in that cockpit) means to me that the pilot elected to take off with that configuration.
I only ever flew the B763 and am not familiar with any differences between that model and the B762. However, as some B762 pilots have stated, that a/c can use Flap 1 for improved climb performance which probably means that there would not be any CONFIG warning.
Therefore, please don't try and create an issue where there is none and this post is going where it should have gone in the first place, the Questions Forum.
