This standard stipulates civil aircraft flight accident events and is the basis for determining flight accident events. This standard applies to all aircraft registered in the People's Republic of China and operated by Chinese legal persons that engage in domestic and overseas civil aviation flight activities." It also applies to aircraft registered overseas and engaged in civil aviation flight activities in my country; this standard does not apply to first-time Any flight before obtaining the aircraft airworthiness certificate. This standard 3.1, 4.28, 4.29, 4.35 applies to military aircraft flying on routes and routes and provided with control and command services by civil aviation.