To take this class you must be a paid member fo the BJCP Study Sessions Class. See this discussion for more details:
CLASS 4: FLAWS / TROUBLESHOOTING – Learn how to detect various flaws, the various causes of each flaw and ways to control the flaws. This session consists of sampling and discussing flawed or doctored beers.
Bickham, Scott & Piatz, Steve (2012). BJCP Beer Exam Study Guide. (pages 42, 67-71). Retrieved from http://www.bjcp.org/docs/BJCP_Study_Guide.pdf.
Palmer, John (2006). How to Brew. Pages (249-262). Boulder, CO: Brewers Publications.