Dhaka, Oct. 21 -- The US Federal Aviation Administration on Tuesday granted final approval to the long-delayed Boeing 737 MAX 10, clearing the way for the US planemaker to begin delivering the largest version of its best-selling aeroplane.

Boeing has said the MAX 10 will be a major driver of cash flow in its ongoing financial recovery following years of crises and controversies that slowed the company's timeline for the MAX 10. So far, airlines have ordered more than 1,550 MAX 10s, and the model accounts for 31 percent of Boeing's outstanding 737 backlog, according to IBA, an aviation analytics consultancy.

The plane is critical to Boeing's fight with Airbus for orders in the lucrative single-aisle jetliner market, with China's COMAC C9...