Design works on air platforms are carried out within the disciplines of internal cabin, structural, avionics and electrical disciplines. Enhancements required by small and large aircrafts in CS-23 and CS-25 category designed and, with approval, provided to airlines and operator institutions.

STM has become an officially authorized institution in the field of approving design changes regarding the civilian airlines upon obtaining the “Design Organisation Approval” from the Directorate General of Civil Aviation (SHGM) and EASA (European Aviation Safety Agency).

Following the EASA-DOA approval, STM is to become eligible to offer services for all types of internal cabin changes in the aircraft, including enhancements, refurbishments and install additional systems in the cockpit and passenger compartments. Also, STM will be able to provide solutions to all national and international civilian airline companies, public aircrafts, training aircrafts, private jets and private aircraft rental companies.