Used as a ground instructional airframe, later registered N74TA. The QU-22B was intended as an unmanned airborne relay for the 'Igloo White' operation during the Southeast Asia War. This placed and monitored sensors to detect traffic along the Ho Chi Minh Trail. In 1970 a detachment of the 553rd Recon Wing known as the "Vampires" conducted the first operational QU-22B mission, all flights then carrying a pilot due to unreliability problems with the equipment. In 1972, after the loss of several aircraft, the USAF cancelled the QU-22 program