Helicopter Sikorsky CH-3E Serial 61-587 Register 66-13288 used by US Air Force USAF. Built 1967. Aircraft history and location Aircraft History 66-13288 US Air Force 1967-07-31Sikorsky S-61R, c/n 61-587, ff? del USAF as CH-3E 66-13288, 31Jul67 1970-02-0321st SOS w/o 03feb70 hit by ground fire in Laos 21st SOS Send Updates Use APP to upload photo @ (optional) When Now? / / Send