Richard Distefano, an Aircraft Maintenance Supervisor from Lovettsville, performs a post-flight inspection of the brand new Boeing 747-8 that just arrived at Dulles from Frankfurt on June 1. He is looking for safety issues like leaks, cracks or damage that occurred during flight. The 747-8 has four GEnx-2B67 engines, which are unique because they incorporate new scalloped edges, which improves fuel efficiency. At over 250 feet long, the plane is now the longest commercial aircraft built in the United States.