Campbell Wilson told staff in a memo that the pilots had passed a mandatory preflight breathalyzer test.

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.

A preliminary report into the June crash found that the plane's fuel control switches had been flipped off one by one

The Indian government has proposed requiring the lowest temperature setting on all new air conditioners to be 20 Celsius, or 68 Fahrenheit.

Medical records for an Air India pilot killed in last month’s crash are reportedly now being reviewed by investigators amid reports he’d been suffering from depression and other mental

The CEO of Air India sought to draw a line under rife speculation around the cause of last month's air disaster in Ahmedebad, saying the preliminary investigation had ruled out a mechanical cause for the crash.

Earlier, India's aviation minister said not to jump to conclusions and another pilots' group criticised the report.