1. Peter Gill Airworthiness Engineer

2. 2 Rule change proposals STC applications and processing Design Delegation changes AC146-1 – Class A/B Classification 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

3. 3 Requirement for STC (FAR 21.113) Changed Product Rule (FAR 21.101) International harmonisation - Bring into line with FAA and EASA Rules 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

4. 4 CAA Policy prior to formal Rule change: - Any design change that changes the data on the Type Certificate data sheet should be an STC 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

5. 5 Publicise this requirement to industry Add condition to all existing delegations that prohibits approval of design change that affects TCDS without prior agreement from Director Require all applicants for STC to go to Part 146 Design Organisation for Statement of Compliance 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

6. 6 CAA Policy (under CAR 21.31(1)(iii)) STC’s – use latest certification basis unless: - Impractical - The increase in safety does not justify the cost - Assessed on a case-by-case basis 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

7. 7 Standardised (through 146 organisations) Will only accept application initially Agree with applicant & 146 organisation - Certification basis - Certification program - Testing and conformity inspections - CAA involvement 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

8. 8 Classification of Class A/Class B Design Changes Proposed Draft - Clarifies existing wording - Adds Engineering methods as way of determining Class A Back to original intention 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007

9. 9 Any design change affecting TCDS should be STC - Change existing delegations to remove ability to approve as modification Changed Product Rule – Latest certification basis for STC’s STC applications and processing - All applications through Part 146 organisations - Agree certification basis and certification program in advance AC146-1 – Class A/B Clarification 2007 DDH Seminar – Part 21 Rule Change Proposals 7 th Sept 2007