Helicopter Sikorsky CH-3C Serial 61-506 Register 62-12581 used by US Air Force USAF. Built 1963. Aircraft history and location Aircraft History 62-12581 US Air Force 1963-11-22del USAF as CH-3C 62-12581 22Nov63 xfer 1550th ATTW, Hill AFB, UT 73 74 xfer 6514th TES, Hill AFB, UT 1987 pres Museum, Edwards AFB, CA. 1550 ATTW 1969-02-25 Sikorsky CH-3E 25feb69 Send Updates Use APP to upload photo @ (optional) When Now? / / Send