Boeing muss über 1000 Maschinen prüfen

© APA/JOHAN NILSSONepa02749350 An SAS Boeing 737 aircraft flies over the ILS poles on its way in to land on runway 3 at Arlanda airport north of Stockholm, Sweden, 24 May 2011. The ash cloud from the volcano Grimsvotn is heading for Scandinavia, expecting to hamper air traffic. EPA/JOHAN NILSSON SWEDEN OUT