ef lav ik ▁land ed . ▁ ▁On ▁ 1 7 ▁April ▁ 2 0 1 0 , ▁the ▁president ▁of ▁German ▁air line ▁Air ▁Berlin , ▁in ▁an ▁interview ▁with ▁the ▁newspaper ▁Bild ▁am ▁Son nt ag , ▁stated ▁that ▁the ▁ris ks ▁for ▁fl ights ▁due ▁to ▁this ▁vol can ic ▁ha ze ▁were ▁none x istent , ▁because ▁the ▁assess ment ▁was ▁based ▁only ▁on ▁a ▁computer ▁simulation ▁produced ▁by ▁the ▁V A AC . ▁He ▁went ▁on ▁to ▁claim ▁that ▁the ▁Luft fahrt - B undes amt ▁closed ▁German ▁air space ▁without ▁checking ▁the ▁accuracy ▁of ▁these ▁simulations . ▁Sp okes men ▁for ▁L uf th ans a ▁and ▁K LM ▁stated ▁that ▁during ▁their ▁test ▁fl ights , ▁required ▁by ▁the ▁European ▁Union , ▁there ▁were ▁no ▁problems ▁with ▁the ▁aircraft . ▁On ▁the ▁morning ▁of ▁ 1 7 ▁April ▁L uf th ans a ▁moved ▁ 1 0 ▁aircraft ▁from ▁Mun ich ▁to ▁Frankfurt ▁at ▁low ▁alt itude ▁following ▁visual ▁flight ▁rules . ▁There ▁were ▁no ▁problems ▁reported ▁and ▁no ▁sign ▁of ▁damage ▁to ▁the ▁plan es . ▁The ▁same ▁day , ▁an ▁Air bus ▁belonging ▁to ▁U ral ▁Airlines ▁attempted ▁flying ▁below ▁the ▁ash ▁clouds ▁from ▁Moscow ▁to ▁R im ini . ▁When ▁the ▁air plane ▁was ▁in ▁Aust rian ▁air space , ▁the ▁crew ▁reported ▁being ▁low ▁on ▁fuel ▁and ▁di vert ed ▁to ▁Vienna , ▁where ▁the ▁air plane ▁land ed ▁safely . ▁ ▁On ▁the ▁morning ▁of ▁ 1 8 ▁April ▁K LM