Helicopter Sikorsky HH-52A Sea Guard Serial 62-109 Register 1421 used by US Coast Guard USCG. Aircraft history and location Aircraft History For 1421 see also 369e 1421 US Coast Guard Sikorsky S-62C c/n 62-109, ff? del USCG as HH-52A Seaguard 1421 unk wfu & expended as range target, Holloman AFB, NM, unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send