A technique for proper design and impact analysis of `event sequencing´ for safety and availability [of aircraft landing gear]

A discussion is presented of event sequencing, the requirement for certain events to occur in a particular order to achieve a desirable effect or to avoid an undesirable effect in aircraft landing gear applications. Such requirements are often motivated by functionality and safety considerations. A simple structured technique is formed from a combination of goal tree analysis and broad fault tree analysis to analyze event sequencing in each operational mode. In addition, this technique provides an effective tool for managing and communicating the design requirements in a concurrent engineering environment involving complex designs with interactive functions