GM No 4 to 21.A.165(c) Airworthiness Release or Conformity Certificate

• ED Decision 2012/020/R found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

GM No 4 to 21.A.165(c) Airworthiness Release or Conformity Certificate ED Decision 2012/020/R The EASA Form 1, when used as a release certificate as addressed in [21.A.165](#_DxCrossRefBm1649096910)(c)(2) and (3), may be issued in two ways: — As an airworthiness release, only when by virtue of the arrangement described in [21.A.133](#_DxCrossRefBm1649096911)(b) and (c), it can be determined that the part conforms to the approved design data and is in a condition for safe operation. — As a conformity certificate, only when by virtue of the arrangement described in [21.A.133](#_DxCrossRefBm1649096911)(b) and (c), it can be determined that the part conforms to applicable design data which is not (yet) approved, for a reason that is indicated in Block 12. Parts released with an EASA Form 1 as a conformity certificate are not eligible for installation in a type-certificated aircraft. The EASA Form 1 should only be used for conformity release purposes when it is possible to indicate the reason that prevents its issue as for airworthiness release purposes. ##### GM No 4 to 21.A.165(c) Airworthiness Release or Conformity Certificate *ED Decision 2012/020/R* The EASA Form 1, when used as a release certificate as addressed in [21.A.165](#_DxCrossRefBm485230401)(c)(2) and (3), may be issued in two ways: — As an airworthiness release, only when by virtue of the arrangement described in [21.A.133](#_DxCrossRefBm485230402)(b) and (c), it can be determined that the part conforms to the approved design data and is in a condition for safe operation. — As a conformity certificate, only when by virtue of the arrangement described in [21.A.133](#_DxCrossRefBm485230402)(b) and (c), it can be determined that the part conforms to applicable design data which is not (yet) approved, for a reason that is indicated in Block 12. Parts released with an EASA Form 1 as a conformity certificate are not eligible for installation in a type-certificated aircraft. The EASA Form 1 should only be used for conformity release purposes when it is possible to indicate the reason that prevents its issue as for airworthiness release purposes.