Helicopter Sikorsky RH-53D Serial 65-415 Register 6-2704 used by hava darya (iranian navy aviation). Built 1977. Aircraft history and location Aircraft History 6-2704 hava darya Sikorsky S-65C-4 c/n 65-415 ff? accepted USN as RH-53D 160102 unk xfer FMS to Iranian Navy as 6-2704, 1978 status unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send