Families of four passengers killed in a June Air India crash have sued Boeing and Honeywell in the US, alleging negligence due to faulty fuel switches. The lawsuit claims the companies were aware of design risks but did "nothing" to prevent the accident.

• A total of 260 people died in the crash of Air India Flight 171, a Boeing 787.
• The lawsuit was filed on Tuesday and seen by the BBC.
• A 2018 FAA advisory had urged, but not mandated, inspection of fuel switch locking mechanisms to prevent accidental movement.