It's not just Air India though.
I was reading an article today in one of the Gulf newspapers (Khaleej Times, I think) that there were 14 pilots and 31 cabin crew from various Indian airlines found to have failed the alcohol test when reporting for duty in the first quarter of 2012 alone.
Air India was not, the article made clear, the worst culprit. That honour went to another Indian airline with a much shorter name. I would paste a link but have been unable to find the article in the online edition.
Does nothing to breed passenger confidence or underpin a safety culture, that's for sure!
Edited to add a different link to same story:
14 pilots, 31 cabin crew failed alcohol test this year - India News - IBNLive