The Boeing 777X program remains one of the most ambitious commercial aircraft efforts of the modern jet age. Combining the long-haul performance of the 777 family with new, state-of-the-art technologies, the 777X is positioned as a flagship aircraft for decades to come. However, despite the anticipation surrounding the aircraft, a longer-than-expected certification process and supply chain delays have pushed the type’s entry into commercial service back by at least seven years. So in this video, we take a look at why Boeing has already produced more than 20 Boeing 777X aircraft before certification, why some of them have been sitting parked for years, and why the oldest 777Xs may not even be delivered first once the aircraft finally enters service.