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uncontained engine rotor failure UERF 1:20 regulation

强调
一般 правило "1/20" сертификации летательного аппарата на нелокализованное разрушение ротора двигателя (Civil Certification Regulation requests aircraft design to be such that the possibility to have a catastrophic event after an engine uncontained rotor failure event is limited to 1/20th for the whole aircraft taken into account all debris potential trajectories. Svetozar)