Helicopter Sikorsky HSS-2 Sea King Serial 61-273 Register 151553 used by US Navy USN. Aircraft history and location Aircraft History 151553 US Navy 1990-05-22 Sikorsky HH-3A Big Mother USN conv HH-3A HC-9 22may90 AMARC/9H0017 HC-9 Send Updates Use APP to upload photo @ (optional) When Now? / / Send