Design of engineering products; Testing the functionality of apparatus and instruments; Testing the functionality of apparatus and instruments in the nature of aircraft components; Testing, analysis, and evaluation of goods or services of others to the order and specification of Federal Aviation Administration; Testing, analysis, and evaluation of goods or services of others to the order and specification of European Union Aviation Safety Agency; Testing, analysis, and evaluation of goods or services of others to the order and specification of Civil Aviation Administration of China; Testing, analysis, and evaluation of the goods of others to assure compliance with industry standards; Testing, analysis, and evaluation of aircraft components to assure compliance with industry standards; Testing, analysis, and evaluation of aircraft components to assure compliance with Federal Aviation Administration industry standards; Testing, analysis, and evaluation of aircraft components to assure compliance with European Union Aviation Safety Agency industry standards; Testing, analysis, and evaluation of aircraft components to assure compliance with Civil Aviation Administration of China industry standards; Testing, analysis, and evaluation of aircraft components to determine conformity with certification standards; Aircraft performance testing; Product testing; Scientific and technological services, namely, testing in the field of aviation; Scientific and technological services, namely, design in the field of aviation; Scientific and technological services, namely, performance testing in the field of aviation; Scientific and technological services, namely, repairing in the field of aviation