Originally Posted by
grov
I remember reading somewhere that 747s had a number of aircon "packs" (7?) that could be brought online, and that the standard approach was only to bring the extra packs online when passengers complained that it was too warm or stuffy. Would be interested to know if this is correct and is still occurring.
A Boeing 747 has three air conditioning "packs". Two packs can supply sufficient air flow into the cabin to maintain the required conditions for normal flight operations.