отчаявшись понять про ситуацию хоть что-то из профильных СМИ, полез на любимый блумберг.
http://www.bloomberg.com/apps/news?pid=20601087&sid=aNe1s2W7hbiQ
Air France-KLM Group and Deutsche Lufthansa AG were among carriers saying they managed to fly aircraft without suffering damage as authorities across Europe extended a flight ban after Iceland’s volcanic eruption.
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“We asked the Frankfurt crew to check any damage with the aircraft and the windows,” Wolfgang Weber, a spokesman at Lufthansa, Europe’s second-largest carrier, said in a telephone interview. “There wasn’t even the smallest scratch.”
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Air Berlin Plc ran two test flights yesterday from Munich to Dusseldorf and from Nuremberg to Hamburg without problems, flying at the permitted 3,000 meters, the carrier said in a statement.“We’re puzzled why the results of the Lufthansa and Air Berlin test flights had no influence on safety authorities’ decision criteria,” Air Berlin CEO Joachim Hunold said.
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и т.п.
того и гляди, дело кончится тем, что выяснится, что в используемых нормативах промахнулись с десятичной запятой