The 737 Max is Boeing’s fastest-selling plane ever. Airlines have placed orders for more than 4,000 of the aircraft, but some are reconsidering those orders, with at least one airline moving to cancel an order for 49 planes.

The 737 Max is Boeing’s fastest-selling plane ever. Airlines have placed orders for more than 4,000 of the aircraft, but some are reconsidering those orders, with at least one airline moving to cancel an order for 49 planes.