OTTAWA—The commander of Canada’s air force says he is concerned about the recent discovery of tail cracks in most of the military’s new Cyclone helicopters, and the need for “non-standard” repairs to each aircraft, but he remains confident in the fleet. The cracks are the latest in a growing list of issues with the Cyclones, including a software problem that caused one of the helicopters to crash off the coast of Greece last year, killing all six service members on board. In an exclusive interview with The Canadian Press, Lt.-Gen. Al Meinzinger said the cause of the tail cracks remains under investigation but revealed each of the 19 of 23 Cyclones affected by the problem requires different types of repairs. “These are non-standard in the sense that every aircraft is slightly different,” he said. “So certainly (I’m) concerned with the fact we’re having to do a non-standard repair and that …