Air India and Boeing are in the midst of significant turnarounds, but knowing the cause of the crash of Flight 171 will take a lengthy investigation.

On June 12, an Air India Boeing 787 crashed near Ahmedabad, killing 241 people, including five medical students in a hostel. The tragedy ignited a major fire and prompted an investigation by the DGCA,

An Air India crash Thursday involved a Boeing 787-8 Dreamliner, which the aircraft manufacturer first delivered 14 years ago.

Over the years, numerous improvements in aircraft design, maintenance and operational procedures have resulted from crash investigations. Each incident, especially a fatal one such as the Air India Boeing 787 crash, offers valuable lessons that can drive further enhancements in aviation safety.

It could take months to fully understand what went wrong in the crash, the first involving a Dreamliner. Officials from India continued the investigation Friday.

Dreamliner has prompted an investigation into pilot training and safety compliance by the DGCA. The incident has raised concerns for Air India and Boeing as both seek to restore public confidence.