It's been my experience (from both sides of the table) to disclose any and all failures. PRIA reports only give the last 5 years of training records from a previous airline. However, the FOIA has everything from your PVT written through ATP. If you busted any checkride or failed a written it will be here. Better to let the individual conducting the interview decide if your failure is pertinent or not as opposed to not disclosing it and losing out on a job or getting asked to leave training.