Final registration - N4257L
Delivered to USAF September 1954 as RC-121D 52-3417
Redesignated EC-121D 1962
Converted to EC-121T but upper radome not removed
To USAF Reserves at Homestead AFB, FL by July 1974
Retired and flown to Davis Monthan AFB for storage March 26, 1976
To Helena Vocational Tech Center, Helena, MT March 1981 as N4257L
Ferried to Helena, MT June 1981 with Frank Lang in command
Used for training at the Helena College of Technology's Department of Aviation Maintenance Technology...engines and systems were run in 2002
