The QTC Story

The founders of QTC veterans of the aircraft components maintenance and repair industry with over 100 years of relevant experience. The founders of Qualified Technologies Corporation are former aerospace OEM engineers from Hamilton Sundstrand and Honeywell.

After H.S. closed the Long Beach facility and moved the product lines to various locations, a group of their engineers formed Qualified Technologies, an FAA and EASA certified repair station concentrating on similar capabilities and product lines (ECS). QTC engineers understand system design, manufacturing, fabrication, quality assurance, troubleshooting, overhaul and repair development.Every member of the QTC team takes pride in providing the highest quality of service you desire and deserve.

We are conveniently located about 50 miles east of Los Angeles, next to the Upland Cable Airport and UPS and FedEx distribution facilities.

Sam Qubain – CEO

Sam brings over 27 years of management, product reliability and process improvement experience. He holds an engineering degree with graduate studies in business and advanced engineering. Sam also holds Lean Manufacturing certification from the University of Tennessee, Black Belt and Green Belt Six Sigma training and certification, and is a current lecturer on topics in Industrial Engineering. His experience with OEMs provides a specialized knowledge of OEM practices, and a keen sense of customer needs. Most recently, he was an engineering and product quality manager at Hamilton Sundstrand Worldwide.

Warren Brown – PRESIDENT

With over 24 years of experience in customer support engineering, warranty analysis, and repair operations, Warren is a veteran of aftermarket services for a variety of propeller and jet aircraft. He serves as the Business Development specialist and successfully secured major accounts for QTC. As a certified pilot, Warren can also communicate to customers on their level.



FAA Air Agency Certification

FAA Air Agency Certification

EASA Approval Certificate

EASA Certificate


Qualified Technologies Certifications


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