We are offering here the Commercial Aircraft Equipment of various types that is used or intended to be used in operating or controlling an aircraft in flight, is installed in or attached to the aircraft, and is not part of an airframe, engine, or propeller. It is any apparatus that performs tests on a device, known as the device under test ( DUT ), equipment under test (EUT) or unit under test (UUT), using automation to quickly perform measurements and evaluate the test results. Commercial Aircraft Equipment is very effective.