Helicopter Sikorsky CH-3C Serial 61-561 Register 65-12786 used by US Air Force USAF. Aircraft history and location Aircraft History 65-12786 US Air Force 1968-10-16 Sikorsky CH-3E USAF conv CH-3E 37th ARRS w/o 16oct68 landed on sea after being hit but sunk by rough seas, crew rescued 37th ARRS Send Updates Use APP to upload photo @ (optional) When Now? / / Send