Helicopter Sikorsky CH-3C Serial 61-545 Register 65-5694 used by US Air Force USAF. Built 1965. Aircraft history and location Aircraft History 65-5694 US Air Force 1965-12-30Sikorsky S-61R, c/n 61-545, ff? del USAF as CH-3C 65-5694, 30Dec65 conv CH-3E unk status unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send