A global commercial aviation investigation system
The investigation process is triggered by accidents and incidents. Incidents are instances of operational conditions that affect or could affect the safety of the airplane. Recent cases involving 787 batteries are considered incidents.
International investigation protocols define policies, processes, and roles and responsibilities for parties involved in an investigation. In the lead are investigative authorities from the country where the accident or incident occurred. They are the only party allowed to comment on progress, final determination and recommended resolution.
787 battery-related investigations
When a 787 ground incident occurred in January 2013 at Boston’s Logan International Airport, the U.S. National Transportation Safety Board (NTSB) stepped in to lead the investigation. Boeing is assisting at the invitation of the NTSB, and the company’s work is directed by the NTSB investigation team.
Similarly, the diversion of a 787 flight in Japan later the same month because of an in-flight battery incident means the Japanese Transport Safety Board is leading the investigation.
Finding answers
Accidents and incidents are rarely caused by a single failure or action. They usually result from a chain reaction or combination of circumstances. That’s why investigations are usually complex and lengthy.
Investigators identify all the factors that might have been part of a chain. Once the probable cause is determined, investigators can make recommendations designed to prevent recurrence, such as new pilot training, new operating procedures, airplane modifications and the incorporation of new technologies.
Solutions that require changes to airplane design take longer because any design changes must be thoroughly tested, analyzed, validated and recertified. In these cases, regulatory agencies authorize interim changes to ensure fleet safety until that full process is completed.
The two incidents occurring in January 2013 remain under investigation by U.S. and Japanese authorities. Boeing will keep the flying public updated on its role in these investigations.