Classify changes to Type Design into minor or major, and approve minor changes Review and approve engineering documentation such as Qualification Test Plans and Reports, ELAs, Safety Analyses (FHA, PSSA, SSA), Avionics Systems Test Instructions, Human Factors reports and Engineering Reports (Type Design data) Participate in design reviews: Preliminary Design Review (PDR), Critical Design Review (CDR), Test Readiness Review Support the engineering organization in establishing Special Conditions together with the authorities, and assist in the analysis and interpretation of the airworthiness requirements and the establishment of compliance methodology guidelines Help define certification basis of new Type Designs and Changes to Type Design as well as verify the engineering reports, conformity documentation and test programs comply with the applicable certification basis Witness certification tests, including component qualification tests, and verify that engineering reports, conformity documentation and test programs comply with the applicable certification basis