If you’re in need of 28420 or Airframe, from Sikorsky Aircraft, Aerospace Unlimited is your one stop shop. We carry Helicopter parts and other items as Wrench,Torque. If there is something specific that you are searching for, browse by Aircraft Model part number such as 28420 in our catalogues to find what you need. 78286, engines, fasteners are just a few of the 6 billion items that we can inventory. And thanks to the various shipping locations that we have, we can ship almost anywhere. Contact us today to get an immediate quote!