A preliminary report about the fatal Air India crash resurfaced a 2018 Federal Aviation Administration notice about Boeing's engine fuel control switches.

The report and India’s inspection order referred to an advisory from the Federal Aviation Administration in 2018 that recommended that carriers using Boeing models, including the 787, inspect the locking mechanism of the fuel control switches to ensure they could not be moved accidentally.

Singapore Airlines on Tuesday said all fuel switches on its Boeing 787 aircraft -- as well as those belonging to its subsidiary Scoot -- are functioning properly in compliance with regulatory requirements.