Heat exchanger systems and methods for controlling airflow cooling are provided. One system includes a bypass pre-cooler (20) having a housing (22), an inlet (36) configured to receive core engine airflow into the housing from one or more aircraft ducts, a...

An integrated power and pressurization management system (100, 200) supplies electrical power and cabin pressurization and cooling air during both airborne and ground operations. The system (100, 200) includes an integral auxiliary power unit (APU) that ha...