The U.S. Federal Aviation Administration and Boeing have privately issued notifications that the fuel switch locks on Boeing planes are safe, a document seen by Reuters showed and four sources with knowledge of the matter said.

Boeing investors finally have details from a preliminary accident report for Air India flight 171, which crashed on June 12 less than a minute after taking off from an airport in Ahmedabad, India.

One month after an Air India flight crashed and killed over 200 people, investigators on Saturday revealed the fuel to both engines of the Boeing 787 plane had been mysteriously cut off prior to the incident.