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.

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.

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

Air India said on Tuesday it would partially restore its international flight schedule that was scaled back following the accident involving flight AI171 on June 12.

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

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

Indian investigators of the deadly Air India airliner crash that killed 260 last month told a meeting of lawmakers that the plane's black boxes were not damaged, two people familiar with the discussions said.

The initial report into the Air India plane crash is in - and we're live in Switzerland for the Women's Euros Jeanette Kwakye is live in Switzerland for the final group games in the Women's Euros Read more