Air India has completed precautionary inspections of the fuel control switch locking mechanisms across its Boeing 787 and 737 fleet, the airline confirmed on Tuesday, reporting no issues. This action follows an ongoing probe into a devastating Air India crash,

The head of the Federal Aviation Administration said Thursday the fatal crash of an Air India Boeing 787 does not appear to be caused by a mechanical issue or inadvertent movement of the fuel control unit.

The preliminary investigation report into the crash by India’s Aircraft Accident Investigation Bureau (AAIB), referred to a 2018 FAA advisory, which recommended, but did not mandate, operators of several Boeing models, including the 787, to inspect the locking feature of the fuel cut-off switches to ensure it could not be moved accidentally.