Defect Incident (DEF) : An incident that involves failure or malfunction of an aircraft or aircraft component, whether found in flight or on the ground
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}