- Certificate of airworthiness
- Airworthiness review certificate
- Certificate of registration
- Aircraft Station Licence
- Insurance certificates
- New Noise Characteristics Data Sheet ( NCDS ) approved by Boeing on 12 FEB 2016
- Letter from Boeing confirming Cargo Air Ltd installed the new noise kit modifications on 07 FEB 2016 and Boeing approved it and issue new NCDS on 12 FEB 2016.
- New Noise Certificate based on Work Order/ Engineering orders completed on on 07 FEB 2016, confirmed/approved by Boeing on 12 FEB 2016 and issued by Bulgarian CAA on 18 Feb 2016
