Final answer:
The CRU regulated connector is subjected to a flow test and an altitude pressure breathing test.
Step-by-step explanation:
The CRU (Circular, Reverse, Unitized) regulated connector commonly used in aerospace applications typically undergoes a flow test and an altitude pressure breathing test. These tests are essential maintenance procedures for ensuring the safety and functionality of an aircraft's life support systems. For aviation life support equipment, a flow test is performed to check the proper function of the oxygen flow from the system to the mask. Additionally, the altitude pressure breathing test is conducted using a specialized chamber to simulate high-altitude conditions and ensure the system provides the correct pressure and mixture of gases to facilitate breathing at different altitudes. These tests are crucial for the safety of personnel aboard military aircraft, particularly fighter jets, where the CRU regulated connector ensures the delivery of breathable oxygen to the crew under varying flight conditions.