Aircraft Air Pressure Controller

An item designed to regulate aircraft cabin and/or compartment pressure by providing a reference pressure signal to control the operation of one or more valves discharging cabin and/or compartment air to the atmosphere. May contain or operate in conjunction with selector controls for desired altitude pressure and altitude rate of change or be pre-set for automatic operation without selector controls. For items consisting of a controller and a valve, see regulator, air pressure, aircraft cabin.