Preparation of expert opinions in the form of test reports.

Preparation of expert opinions in the form of test reports, which prove in particular:

- Changes in design taking into account the noticeability, the influence on the required driving license

- Findings that lead to the expiry of the operating license

- Traffic uncertainty due to defects or wear

- compliance/violation of noise limits

- Exhaust gas special examination to detect tampering with the flue gas system