I don't think you can "fail" the interview. What they can and have done is put off you upgrade. More then a handful have had their upgrade delayed a few months (thats that many months not making CA pay). A select few have been told they will not upgrade period. People who upgraded right away have still unsat in sim, AND there have been some times where FO's upgraded without having an interview despite the fact the company says you must have one. Hmmmm and people actually wonder why there is all this ALPA talk.