F & R ?
www.flightaware.com is showing 20 flights on N505EA since September 15. Four sorties on the 15th, five on the 16th and the fourth flight of today is en route to Lubbock as of "post time."
As written previously, Functional and Reliability testing is usually the last major task prior to final certification.
According to FAR 21.35 Paragraph(f)(1) & (2), applicants using an engine not previously used in a certified airplane must log 300 hours. If the engine has been used in a previously certified airplane the requirement is halved to 150 hours.
Unless Vern could somehow convince the FAA the Pratt 610F is the same as a 615F, they would need 300 hours of flight testing.
Flights to date are to airports in California, Texas, Colorado and Arizona...around two hours in duration. Cruise speeds are quite slow since they are trying to log time, not miles.