Originally Posted by spainflyer

This question has been discussed several times on these boards this summer. Consensus is that to use a/c or not is the pilot's call. As long as the pilot is cool in his cabin, he may or may not be thinking of the comfort of passengers. And, as has been stated frequently, it is a fuel-saving measure to leave the a/c off while on the ground. Different airlines have different guidelines, but the final decision is the pilot's.