This article introduces the nosewheel turning system principle of 737 NG series aircraft. Combined with the author's experience of trouble shooting in Air China Chongqing Maintenance Base for many years, this article summarizes a set of practical quick troubleshooting method in view of the nosewheel offtracking in ground taxiing.%本文通过对737NG系列飞机前轮转弯系统原理介绍为出发点，结合作者在国航重庆维修基地工作多年的排故经验，针对经常出现的“地面滑行时前轮跑偏”这一故障信息，总结出了一套切实可行的快速排故方法，供大家研究讨论。
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