Grapevine-based Dallas Airmotive Inc., a provider of turbine engine overhaul and repair services, is starting on its new 20-acre test facility and rotorcraft center at the southern end of Dallas/Fort Worth International Airport. The move — an expansion for the company — will help Dallas Airmotive consolidate portions of its turbine engine repair and overhaul business leading to a more streamlined and efficient business model, said Doug Meador, president of the company, which is a subsidiary…