（案例分析）2020年1月27日，福州航空B737-800执行三亚-赣州-哈尔滨航班。在未经机务短停检查和放行情况下完成赣州-哈尔滨航段运行。飞行机组关舱门前未确认飞机维修放行签署情况；滑行阶段发现问题后未滑回，而是通过塔台管制员询问维修放行人员信息，擅自代填技术记录本后起飞。请分析该机组存在的问题。（Cases analysis）On January 27th, 2020, Fuzhou Airlines B737-800 executed the Sanya - Ganzhou - Harbin flight, and they had completed the Ganzhou-Hharbin segment operation without aircraft short-stop maintenance inspection and release.The flight crew did not confirm the signature of the aircraft maintenance release before closing the cabin door;During the taxiing phase, the crew did not taxi back after finding the problem, instead they asked the maintenance and release personnel information through the tower controller, and then took off after filling in the technical record book by themselves without authorization.Please analyze the problems this crew has.