The mistakes were found after DNA testing by a coroner in London. The Indian government said bodies of the Flight 171 victims “were handled with utmost professionalism.”

© Atul Loke for The New York Times

An investigation into a deadly crash last month has focused on control switches that cut off fuel to an Air India Boeing jet after takeoff.

© Adnan Abidi/Reuters

His son and daughter-in-law brought love to his home and represented the family’s hope for a better life.

A preliminary assessment in last month’s disaster focusing on fuel being cut to both engines only deepened the mystery for people grieving loved ones.

© Atul Loke for The New York Times

Investigators released a preliminary account of the crash, describing how the plane struggled after its fuel supply was cut.

© Atul Loke for The New York Times

A focus on the Boeing 787’s fuel switches in a preliminary assessment raised questions about the pilots’ actions, but much is still unknown about Flight 171.

© Atul Loke for The New York Times