Helicopter Sikorsky MH-53E Sea Dragon Serial 65-510 Register 162497 used by US Navy USN. Aircraft history and location Aircraft History 162497 US Navy 1st Pre-production MH-53E 1988 asg to RWATD (Rotary Wing Aircraft Test Directorate, today's HX-21) HX-21 2003 HM-15 /TB-10 2014 still HM-15 Send Updates Use APP to upload photo @ (optional) When Now? / / Send