Hold yer horses, there lads! A birdie told me that there is every chance that this story is related to an upcoming wet lease by Eirjet of one of their aircraft back to Air Jamaica for the busy winter season in the Caribbean.
This would make sense of the application to the U.S. DoT as the aircraft would be more than likely used at some stage for flights from Jamaica to the United States?
Just don't see any charters from Ireland to the USA with the A320s unless they stop off at Gander or St Johns for fuel.