This paper discuss the Qualification Test Procedure which is composed of main functional and environmental tests for the localizing avionics and subsystems, especially the detail test approaches of General Avionics Computer(GAC) through the analysis of related technical data packages for the purpose of performance proof of final products. Quality assurance procedures are properly established with the several kinds of inspections and functional test items. They are called as process inspections, functional test, acceptance test procedure and qualification test procedure. The qualification test procedure are composed of the analysis of original engineering design concept and shall be performed for the acquisition of the certification of the GAC’s quality as well as the aquisition of the related techniques and engineering know-how items.