Cathay Pacific Airways is studying plans to park even more aircraft abroad in long-term storage, the Post has learned, with a recovery in air travel taking longer than anticipated.The group, which also covers Cathay Dragon, could send as many as half of its 180 passenger aircraft to desert locations eventually, one source familiar with the matter said, but another said it could be slightly less.A revised number of planes that will be parked is yet to be finalised, but it would still be larger…