What steps to discover all the chain of event of aiplane accident??

When the accident was occured ,the there’s were many steps and many time that must be spend to discover the all chain of the event that led the specific accident.First step,the investigators will piece together the accident with help from the flight data recorder, & cockpit voice recorder.The flight data recorder records the aircraft parameters like speed, altitude,& track. The CVR records the actual cockpit conversation.
Next step, pilots are taught CRM, or Cockpit Resource Management in order to guard against making errors that lead to a chain of events. The CRM is using all the resources including equipment, procedures, & people to promote safety and enhance the efficiency of flight operations. An example of a flight crew using CRM is lets say a crew heard a small vibration on a flight. The crew will investigate that vibration using resources like the checklist, checking with the flight attendants, the passengers, or calling maintenance while in flight so as to solve the problem of finding the source of that vibration. In otherwords, everyone including passengers have an input when it comes to safety. All it takes to avoid an accident is a well trained crew using CRM to avoid that critical chain of events, or recognizing when you started that chain and recovering from it. In the real world when a captain of a flight notices that a error in their flight, the captain will evaluate that mistake, risk, and refocus on methodically paying attention to details to continue a safe flight.