Indian investigators' preliminary report on the crash of an Air India flight that killed 260 people has put the focus squarely on the pilots and the aircraft's fuel switches.

The release over the weekend of the preliminary report on last month’s deadly crash of an Air India flight has stirred controversy in the aviation community with some asserting that the crash could have been caused only by pilot suicide.

The investigation report says Air India did not carry out those inspections - prompting speculation that the accident could have been caused by faulty switches being flipped by accident. However, in an internal note seen by the BBC, the FAA has since reiterated its belief that the issue did not compromise safety.