Zvisinei, kunyanya zvakakomba mukuru-nokukurumidza flutter dambudziko rakagadziriswa chete nokuisa depleted uranium counterweights sezvo ballast ari outboard injini nacelles okutanga 747s. Zvisinei, ichi chiyero kwakakonzera kuzvidya mwoyo apo ndege izvi yakadonha, somuenzaniso El Al Flight 1862 pa Amsterdam muna 1992 pamwe 282 makirogiramu (622 lb) kuti uranium ari tailplane (horizontal stabilizer). The ndege bvunzo chirongwa akakanganiswa nezvinetso 747 raMwari JT9D injini. Zvinetso zvaisanganisira nokukurumidza injini throttle kufamba uye kukanganiswa turbine casings pashure pfupi nguva basa.
injini stalls kunokonzerwa nokukurumidza throttle kufamba uye kukanganiswa turbine casings pashure pfupi nguva basa