Helicopter Sikorsky SH-3D Sea King Serial 61-421 Register 154121 used by US Navy USN. Aircraft history and location Aircraft History 154121 US Navy 1993-12-13USN conv SH-3H 13dec93 to 9H0053/AMARC conv UH-3H sep08 NAS Patuxent River Send Updates Use APP to upload photo @ (optional) When Now? / / Send
