GM1 21L.B.44 Special conditions

• ED Decision 2023/013/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

GM1 21L.B.44 Special conditions ED Decision 2023/013/R GENERAL The term ‘novel or unusual design features’ should be judged in view of the applicable certification basis for a particular product. A design feature, in particular, should be judged to be a ‘novel or unusual design feature’ when the certification basis does not sufficiently cover it. The term ‘unsafe condition’ is used with the same meaning as described in [AMC1 21L.B.23(b)](#_DxCrossRefBm1649097735) ‘Airworthiness directives’. The term ‘newly identified hazards’ is intended to address new risks that may be recognised in the design (e.g. questionable features) or its operational characteristics (e.g. volcanic ash) for which there is not yet enough in-service experience. ##### GM1 21L.B.44 Special conditions *ED Decision 2023/013/R* **GENERAL** The term ‘novel or unusual design features’ should be judged in view of the applicable certification basis for a particular product. A design feature, in particular, should be judged to be a ‘novel or unusual design feature’ when the certification basis does not sufficiently cover it. The term ‘unsafe condition’ is used with the same meaning as described in [AMC1 21L.B.23(b)](#_DxCrossRefBm485231231) ‘Airworthiness directives’. The term ‘newly identified hazards’ is intended to address new risks that may be recognised in the design (e.g. questionable features) or its operational characteristics (e.g. volcanic ash) for which there is not yet enough in-service experience.