To climb onto the wing and check fuel even if you watched the line guy fill it up. Two times, both times of which I was extremely reluctant to get my ladder out and do it (and once was at night while I was running late) I checked behind the line guys and found a fuel cap off one time and loose the other time.

EVERYONE gets in a hurry and makes mistakes every now and then.

Keven
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LAMBORGHINI MURCI?LAGO