21.A.604 ETSO authorisation for an auxiliary power unit (APU)

• Regulation (EU) 2022/201 found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)

21.A.604 ETSO authorisation for an auxiliary power unit (APU) Regulation (EU) 2022/201 With regard to an ETSO authorisation for an APU: (a)     by way of derogation from points [21.A.9](#_DxCrossRefBm1649096951), [21.A.603](#_DxCrossRefBm1649096863), [21.A.610](#_DxCrossRefBm1649097441) and [21.A.621](#_DxCrossRefBm1649097440), the following points shall apply: points [21.A.15](#_DxCrossRefBm1649096854), [21.A.20](#_DxCrossRefBm1649096852), [21.A.21](#_DxCrossRefBm1649096866), [21.A.31](#_DxCrossRefBm1649096925), [21.A.33](#_DxCrossRefBm1649096983), [21.A.44](#_DxCrossRefBm1649096949), [21.A.47](#_DxCrossRefBm1649097023), [21.B.75](#_DxCrossRefBm1649097063) and [21.B.80](#_DxCrossRefBm1649096853). However, an ETSO authorisation shall be issued in accordance with point [21.A.606](#_DxCrossRefBm1649096861) instead of the type-certificate; (b)     by way of derogation from point [21.A.611](#_DxCrossRefBm1649097039), the requirements of Subpart D shall apply to the approval of design changes by the APU ETSO authorisation holder and design changes from other applicants classified as a minor change, and the requirements of Subpart E shall apply to the approval of design changes by other applicants classified as a major change. Where the requirements of Subpart E apply, a separate ETSO authorisation shall be issued instead of a supplemental type certificate; and (c)      the requirements of Subpart M shall apply to the approval of repair designs. #### 21.A.604 ETSO authorisation for an auxiliary power unit (APU) *Regulation (EU) 2022/201* With regard to an ETSO authorisation for an APU: (a) by way of derogation from points [21.A.9](#_DxCrossRefBm485230442), [21.A.603](#_DxCrossRefBm485230353), [21.A.610](#_DxCrossRefBm485230934) and [21.A.621](#_DxCrossRefBm485230933), the following points shall apply: points [21.A.15](#_DxCrossRefBm485230344), [21.A.20](#_DxCrossRefBm485230342), [21.A.21](#_DxCrossRefBm485230356), [21.A.31](#_DxCrossRefBm485230416), [21.A.33](#_DxCrossRefBm485230474), [21.A.44](#_DxCrossRefBm485230440), [21.A.47](#_DxCrossRefBm485230514), [21.B.75](#_DxCrossRefBm485230554) and [21.B.80](#_DxCrossRefBm485230343). However, an ETSO authorisation shall be issued in accordance with point [21.A.606](#_DxCrossRefBm485230351) instead of the type-certificate; (b) by way of derogation from point [21.A.611](#_DxCrossRefBm485230530), the requirements of Subpart D shall apply to the approval of design changes by the APU ETSO authorisation holder and design changes from other applicants classified as a minor change, and the requirements of Subpart E shall apply to the approval of design changes by other applicants classified as a major change. Where the requirements of Subpart E apply, a separate ETSO authorisation shall be issued instead of a supplemental type certificate; and (c) the requirements of Subpart M shall apply to the approval of repair designs.