>>Don't know where you get this from.
Airlines in the U.S. are under DOT 49 CFR Part 40 which states that if you blow .02 or higher you will be removed from a safety sensitive postion for at least 24 hours.
Most airlines advertize a "zero tolerance" policy and will terminate your employment for a .02. Almost all airlines have an approved SAP or substance abuse program, in some cases you might be able to get a job (and medical, if it was over .04) back if you went through rehab and the >02. did not occur while "on duty" in a safety sensitive position. In the past wide discretion has been used but as more of these incidents hit the media, fewer folks seem to come back from a booze bust.