hina's civil aviation regulator on Wednesday gave a briefing on a preliminary investigation of the China Eastern Airlines passenger plane crash in March. The report contains information about the plane's flight history, crew and maintenance personnel, maintenance, wreckage distribution and other issues, the Civil Aviation Administration of China said in a statement.

4月20日，中国民航局公布“3 21”东航MU5735航空器飞行事故调查初步报告，报告主要包括飞行经过、机组机务人员、适航维修、残骸分布等事实信息。

The report reveals the flight's crew and maintenance personnel met standards and the plane's airworthiness certificate was valid. There were no items on board that had been declared as dangerous goods, nor any forecasts of dangerous weather. Before the plane deviated from cruising altitude, radio communications between the crew and air traffic control did not show any abnormality.
报告称，经调查，当班飞行机组、客舱机组和维修放行人员资质符合要求；事故航空器适航证件有效；机上无申报为危险品的货物；飞行涉及的航路沿途无危险天气预报；在偏离巡航高度前，机组与空管部门的无线电通信和管制指挥未见异常。

The investigation team will continue with its work, which includes debris inspection and flight-data analysis, to find the cause of the accident.
后续，技术调查组将继续深入开展残骸识别、分类及检查、飞行数据分析等调查工作，科学严谨查明事故原因。