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该发动机在叶片脱开试验时发生故障后,CFMI公司计划在-7B上试验修改的风扇叶片保持环。尽管要进行新的试验但公司相信仍能按计划在今年10月末取得-7B的合格证。解决办法是加强每个叶片根部燕尾糟的保持环
After the engine failed during the blade release test, CFMI planned to test the modified fan blade retaining ring at -7B. Despite the new test, the company believes it will still be able to obtain a -7B certificate by the end of October this year. The solution is to strengthen the retaining ring of the dovetail at the root of each blade