Airbus signed two mammoth orders for its A320 and A350 aircraft worth $30 billion at Dubai’s air show Monday, with Boeing managing only a $1.2 billion sale of its troubled 737 MAX. Boeing’s deal with Turkish carrier SunExpress was for a modest 10 planes but it represented “the first firm order” for the 737 MAX since it was grounded in March, a source at the airline told AFP. Analysts said it gave some welcome support for Boeing after the future of the model was put in doubt with two crashes that left a total of 346 people dead.