CTT | Humidity In Balance

Quality Systems and Third Party Approval

CTT currently holds certification from the Swedish Civil Aviation Authority in accordance with the common European standards issued by the EASA (European Aviation Safety Agency); Part 21 POA EASA Part 21 Subpart G approval resp. MOA EASA Part 145 approval. CTT is also approved FAA Repair Station and holds TCCA CAR 573 approval. These authorizations together mean that CTT is qualified to manufacture and maintain airworthy material.

CTT is also certified in accordance with AS9100:D and ISO 9001:2015 by Intertek. Certification In accordance with FAA:s Part 145 enabling CTT to become a certificated global repair station is a possibility in the next few years.

Approvals and certifications can be found under Downloads.


An aircraft’s basic configuration has a type certificate (TC). All retrofit equipment installed must be approved with a Supplement Type Certificate (STC). An STC means that the certifying civil aviation authority has approved both the system and its installation from an airworthiness viewpoint.

Within the EU STCs are often issued by the EASA. An STC issued by the FAA (Federal Aviation Authority in the USA) is in reality the same as global certification. CTT and Lufthansa Technik have a co-operation agreement regarding certification.

This agreement means that Lufthansa Technik acts as CTT:s formal design organization and maintains STCs for CTT products in return for royalties on systems sold. This agreement is very useful in the sales process as Lufthansa Technik has an excellent reputation for certification, and affords the possibility of maintaining STCs from both the EASA and FAA.