The U.S. Federal Aviation Administration and Boeing have privately issued notifications that the fuel switch locks on Boeing planes are safe.

Fuel switches of the Boeing 787 Dreamliner have come under scrutiny after a preliminary crash report raised questions about how the controls were moved from the "run" to "cutoff" position, starving the engines of fuel.

The US Federal Aviation Administration has issued a notice to its international counterparts that fuel control switches in Boeing aeroplanes like the Dreamliner involved in last month’s fatal Air India crash do not pose a safety issue.