某型飞机在使用后检查发现,飞机的右主起落架下扭力臂大双耳根部R处有一裂纹。通过对扭力臂的受力分析,以及对故障件的宏观观察、裂纹理化分析,找出了扭力臂出现裂纹的原因,并给出了解决措施。 A certain type of aircraft was examined after use and found that there was a crack at the root R of the large ear of the torque arm under the right main landing gear of the aircraft. Through the analysis of the force of the torsion arm, as well as the macroscopic observation and the physical and chemical analysis of the cracked parts, the cause of the crack appeared in the torsion arm was found and the solutions were given.