Helicopter Sikorsky HO4S-1 Serial 55-006 Register 125506 used by US Navy USN. Built 1950. Aircraft history and location Aircraft History 125506 US Navy 1950-08-13Sikorsky S-55 c/n 55-006, ff:? acc BuAerRep (BAR) East Hartford, CT, 13Aug50 del USN as HO4S-1, 125506, 31Aug50 pres Texas Air Museum. 2012-07 A KTYR on display at Historic Aviation Memorial Museum, Tyler Pounds Regional Airport at Tyler, Texas. It has been repainted. Send Updates Use APP to upload photo @ (optional) When Now? / / Send