The deadly Air India crash last month has renewed a decades-old debate in the aviation industry over installing video cameras monitoring airline pilot actions to complement the cockpit voice and flight data recorders already used by accident investigators.

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 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.

Although the preliminary report into what caused the loss of Air India Flight 171 last month has provided some answers, it has also prompted a wave of speculation about its cause. The BBC's International Business Correspondent Theo Leggett reports on what we know - and what we don't know - so far.