Glossary of Terms

	Title	Definition
	Component	A "component" is any software or equipment that would normally be part-number-controlled at the aircraft level and are applicable to all aircraft systems and associated non-structural components, including the interfaces with structural components, and items consumed by the systems, such as lubrication, fuel, and hydraulic fluid. These part numbers are typically shown on the system or airplane-level installation drawings [ANM-03-117-10, page 2].
	Conclusion	A judgement or statement arrived at by any reasoning process [Oxford English Dictionary 1991]
	Condition	An existing or potential state such as exposure to harm, toxicity, energy source, activity, etc.
	Contributing Factors	Other conditions (whether normal states/events or coincident failures) which must hold for a given event to lead to a hazard or accident.
	Control Area	Designated area of airspace in which all aircraft movements are under radio direction of Air Traffic Control.
	Control Zone	Designated airspace encompassing terminal area of an airport in which all aircraft movements are under radio direction of Tower Controller.
	Conventional.	A system is considered to be Conventional if its functionality, the technological means used to implement its functionality, and its intended usage are all the same as, or closely similar to, that of previously approved systems that are commonly-used [AMC to CS25.1309].
	Co-ordinates	Latitude and longitude of a position anywhere on the earth's surface, estimated to one minute of an arc.
	CRT	Cathode Ray Tube [Screen/Display].
	Cut sets	Ways in which failure can occur. Used in Fault Tree Analysis.
	CVR (Cockpit Voice Recorder)	Sophisticated, "crash proof" tape recording equipment fitted to airline aircraft to record flight crew conversations and radio transmissions. The tape is (typically) a 30 minute closed loop which is continuously recycled, providing a complete audio record of the last 30 minutes of any flight.
	CVSM	Conventional Vertical Separation Minimum
	Design	The whole intellectual process of converting a requirement into st of manufacturing drawings
	Design Appraisal.	This is a qualitative appraisal of the integrity and safety of the system design [AMC to CS25.1309].
	Design Rigour	Extent (quantity and quality) of effort during the design process

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