With conclusive information hard to come by weeks after the fatal Air India crash, the aviation industry has shifted its focus to the possible pilot error.

The United States National Transportation Safety Board Chair Jennifer Homendy said on Friday that recent media reports on the crash of an Air India Boeing Dreamliner that killed 260 people were premature and speculative.

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.