Boeing’s chief executive insisted on Wednesday that, despite delays and a damaged reputation, the 737 Max will fly again.“I believe in this aeroplane,” David Calhoun said. Mr Calhoun’s comments, during his first call with journalists since taking the helm nine days ago, came the day after Boeing said it did not expect the Max would be certified safe to fly until the middle of the year, months later than the previous estimate.But Boeing plans to restart production of the Max before mid-year, and the supply chain “will be reinvigorated before that”, Mr Calhoun said. “We got to get that line started up again,” he said. Boeing paused Max production at its factory in Renton, Washington, this month to avoid adding to the growing inventory of grounded planes that cannot be delivered to customers.It has been working on software changes and a pilot training plan to persuade the US Federal Aviation Administration to lift the grounding, which took effect 10 months ago following two fatal crashes of the jet. The company stretched out its timeline for the FAA’s certification process after it decided to recommend that pilots receive training in flight simulators.