Helicopter Sikorsky HO4S-3G Serial 55-1117 Register 1326 used by US Coast Guard USCG. Built 1957. Aircraft history and location Aircraft History For 1326 see also sa330b 1326 sa341f 1326 1326 US Coast Guard 1957-09-30Sikorsky S-55 c/n 55-1117, ff:? del USCG as HO4S-3G, 1326, 30Sep57. Send Updates Use APP to upload photo @ (optional) When Now? / / Send