Vietnam Airlines has signed a memorandum of understanding (MOU) for 10 more Airbus A350-900s, which it plans to use on nonstop flights to the US. The Hanoi-based carrier already has four aircraft in service, with another 10 on firm order. “The additional 10 aircraft covered by today’s MOU will enable Vietnam Airlines to operate nonstop to the US West Coast, carrying 305 passengers in a three-class premium layout,” Airbus said, announcing the agreement on Sept. 6.The Rolls-Royce Trent XWB-powered aircraft will initially be used to open a new service between Ho Chi Minh City and Los Angeles. Vietnam Airlines president and CEO Duong Tri Thanh said the airline has had an “excellent experience” since the A350 entered service last year.<br/>