The German aviation sector called on Sunday for taxes on air travel to be cut. “Flying has to remain affordable,” German aviation sector association (BDL) president Jens Bischof said in remarks published by the Frankfurter Allgemeine Zeitung newspaper. “The air transport tax must be abolished. Sweden has shown the way,” he said. Ryanair chief executive Eddie Wilson had earlier made a similar call. Ryanair, along with certain other airlines, is withdrawing from German airports, citing high costs. The key issue is a 25% increase in the tax imposed on May 1 this year, implying additional costs of…