N4257L c/n 4335

52-3417 is seen at Homestead AFB, Florida in July 1974 while on its last duty assignment to the USAF Reserves (Steve Williams)	Twenty-three years after being delivered to Helena, this veteran is still being used for the training of aspiring aircraft technicians (Michael Blank)

• Final registration - N4257L
• Delivered to USAF September 1954 as RC-121D 52-3417
• Redesignated EC-121D October 1963
• Redesignated EC-121D/T
• Redesignated EC-121T August 1970 but upper radome not removed
• To USAF Reserves at Homestead AFB, FL June 1974
• Retired and flown to Davis Monthan AFB for storage March 1976
• To Helena Vocational Tech Center, Helena, MT March 1981 as N4257L
• Ferried to Helena, MT early July 1981 with Frank Lang in command
• Used for training at the Helena College of Technology's Department of Aviation Maintenance Technology. Engine run-ups performed regularly until early 1990’s
• School still using aircraft for training until at least the mid 2000's
• Declared excess to school's needs and school looking for a new home for aircraft in November 2008
• Evergreen Air and Space Museum acquired aircraft in May 2009 and plans to make it airworthy and fly it from Helena to McMinnville, Oregon
• Aircraft evaluated in July and cleanup began in September 2009