Helicopter Sikorsky CH-3C Serial 61-539 Register 64-14236 used by US Air Force USAF. Built 1965. Aircraft history and location Aircraft History 64-14236 US Air Force 1967-06-23Sikorsky S-61R, c/n 61-539, ff? del USAF as CH-3C 64-14236, 02-11-65 conv CH-3E unk Destroyed S.E.A. 23Jun67. 1967-08-23 Sikorsky CH-3E 20th HS w/o 23aug67 engine failure in Laos w/o 23aug67 was shot down supplying Lima Site 85. My dad was crew chief Send Updates Use APP to upload photo @ (optional) When Now? / / Send