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助推器接缝设计不当可能不是发生事故的唯一原因。外挂燃料箱与右侧助推器相连接的一个支柱过载可能是引起事故的另一原因。一项新的录像磁带分析表明,“挑战者”号在飞行到73秒爆炸之前的18秒,助推器上就有构件脱落。
Improperly designed booster seams may not be the only cause of an accident. Overloading a pillar connected to the right booster with the outboard fuel tank can be another cause of the accident. A new videotape analysis showed that the Challenger dropped off on the booster 18 seconds before flying to 73 seconds of explosion.