The A3D-2T was a bombardier-navigator trainer version of the A3D-2.
Like the A3D-2Q, the A3D-2T differed from the A3D-2 in having a pressurized cabin in place of the bomb bay. In the A3D-2T, this pressurized cabin acted as a classroom for an instructor and four bombardier/navigator trainees. These people sat in forward-facing seats. There were four rectangular windows cut into each side of the fuselage. The forward cockpit still seated three--a pilot, a copilot, and a trainee with a seat behind the pilot facing forward instead of backwards. Bomb damage assessment cameras and recorders were installed in a turret-like tail fairing. A training shape for a nuclear weapon could be carried underneath each wing outer panel
The first A3D-2T flew on August 29, 1959. A total of 12 A3D-2Ts were built. They all had the cambered leading edge wings of the later A3D-2 as well as the refueling probe, but they had the pointed nose radomes of the earlier A3D-2. However, most of these pointed nose radomes were later replaced by the flat panel radome that was fitted to late production A3D-2s, and most were retrofitted with the dovetail fairing.
In September 1962, the A3D-2T was redesignated TA-3B.
Five TA-3Bs (144857, 144860, 144863, 144864, and 144865) were modified as VIP staff transports. They were fitted with airliner-type accommodations in the fuselage, such as galleys, tables, airline-type seats, and bunks. The overall configuration could be set up for six to nine seats (9 without the table) The single seat and coat closet on the starboard side could be exchanged for a couch or bunk. Most of them retained their TA-3B designations, but two of them (144857 and 144865) were redesignated UA-3B.
144856/144867 Douglas A3D-2T Skywarrior C/n 12102/12113. Redesignated TA-3B in 1962.