FedEx scope is that any aircraft over 60,000 pounds max gross takeoff weight will be flown by pilots on the master seniority list.
Many of our packages are moved by contract companies flying FedEx owned feeder aircraft. Those pilots work for the contract company, not FedEx. So although the aircraft is owned by FedEx, it isn't really part of the "scope" of the FedEx CBA with the mainline pilots. I wouldn't be surprised if there are boxes moved by other operators with their own aircraft as well.
FJ