These are the Sonair 744’s (will be operated by Atlas) that should have started operating the regular scheduled service between KIAH and FNLU beginning on May 3.
World Airways has been operating these routes for Sonair with MD-11’s and Atlas was supposed to take over but for some reason, has not yet done so.
Not sure what the problem is but I would think it will be sorted out soon and they will be up flying shortly.