Give the guy/girl a way out.....my experience of people turning up to work full of booze, both aviation and non-aviation related is that there is usually a bigger picture to think about.
Be upfront, tell the individual you smell alcohol, and that you suspect they are drunk. Dont be nice about it, be firm and matter of fact.
Then give them a way out, tell them to go sick or it gets reported to the company.
Then to cover yourself, next time you see the chief pilot etc...have a word and tell him your a bit concerned about so an so, no need to be specific..just a word to the wise and all that.
Its happened to me..and it worked a treat, the guy admitted he had a problem (drink) sought help..and is now doing great things with his career.
My thoughts anyway.
