Cabin Pressure Control Systems encompass the hardware and control logic used to regulate differential pressure and cabin altitude within pressurised aircraft fuselages, covering outflow valves, safety relief valves, negative-pressure relief valves, and cabin pressure controllers (CPCs) that modulate bleed-air scheduling in conjunction with the aircraft's ECS to maintain cabin altitude typically below 8,000 ft and manage pressurisation schedules during climb, cruise, and descent.
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