HH - are you seriously suggesting J2 have taken on excess capacity for the summer, in readiness for the winter???? An interesting way to bankrupt an airline quickly I suppose, but thankfully PM is a bit more switched on. The extra 737 and 757 are the aircraft needed to operate the summer programme. For winter, they will sit around with the rest of the fleet and some of the crew on part time contracts or go through maintenance. Until there is a major improvement in trading conditions that trickles through into stronger winter trading, J2 will be do the vast majority of their flying between April - October.