Helicopter Bell UH-1N Serial 31078 Register 69-7537 used by US Air Force USAF. Aircraft history and location Aircraft History 69-7537 US Air Force 1st HS 1st HS USAF 1998 1st HS. 1st HS 2022-08-20 697537 Camp Springs, Maryland 697537 Camp Springs, MarylandCall sign for this aircraft: 697537 Send Updates Use APP to upload photo @ (optional) When Now? / / Send