Boeing has rolled out the largest version of the 737 - the 737 MAX 10 model. The debut was made in front of thousands of employees at Renton Mark Jenks, vice president and general manager of the 737 program said that "today is not just about a new airplane. It’s about the people who design, build and support it. This team’s relentless focus on safety and quality shows the commitment we have to our airline customers and every person who flies on a Boeing airplane.” READ: Highly respected aviation experts critical of Lion Air crash report and pilots. READ: Emirates opts for very special Premium Economy  The 737 MAX 10, the largest variant of the MAX family, can seat up to 230 passengers and offers the lowest seat-mile cost of any single-aisle airplane ever produced. The airplane will now undergo system checks and engine runs prior to first flight next year. “I’m honoured to take this airplane on its first flight and show the world what you’ve put your heart and soul into,” 737 Chief Pilot Jennifer Henderson told the employee crowd. The 737 MAX 10 currently has more than 550 orders and commitments from more than 20 customers around the globe. Mr Jenks is one of Boeing's most celebrated engineers and leaders and was brought in earlier this year to oversee the modifications to the MAX models in the wake of the Lion Air and Ethiopian crashes.