Otú ọ dị, a karịsịa oké elu-ọsọ flutter nsogbu e edozi naanị site inserting depleted uranium counterweights dị ka ballast na outboard engine nacelles nke n'oge 747s. Nke a jikoro mere nchegbu mgbe ndị a ugbo elu jiri, n'ihi na ihe atụ El Al Flight 1862 na Amsterdam na 1992 na 282 kilogram (622 lb) nke uranium na tailplane (horizontal stabilizer). The ụgbọ elu ule usoro e gbochie nsogbu na 747 si JT9D engines. Ihe isi ike gụnyere engine stalls kpatara ngwa ngwa throttle mmegharị na distortion nke turbine casings mgbe a mkpirikpi oge nke ọrụ.
ụgbọelu nnwale ise merụrụ nnukwu ahụ n'oge ha na-achọ ibata