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 site nsogbu na 747 si JT9D engines. Ihe isi ike gụnyere engine stalls mere site ngwa ngwa throttle mmegharị na distortion nke turbine casings mgbe a mkpirikpi oge nke ọrụ. The nsogbu na-egbochi ụgbọ elu na-egbu oge n'ihi na ụgbọ elu na-ewepụ ihe mgbochi ndị ọzọ mgbe mbụ na-ewepụ engine engine na-ewepụ na ụgbọ elu na-arụ ọrụ na December 28, 1969, mgbe ụgbọ elu na-agba ọsọ n'etiti ụlọ ọrụ ụgbọ elu Renton Renton.
nnukwu ọsọ ọsọ ọsọ