{
  "url": "https://openlegislation.uk/eu-regulation-2012-748/annex-I/section-A/division-subpart+o/division-21.a.604",
  "json_url": "https://openlegislation.uk/eu-regulation-2012-748/annex-I/section-A/division-subpart+o/division-21.a.604.json",
  "legislation": "eur/2012/748",
  "legislation_title": "Commission Regulation (EU) No 748/2012 of 3 August 2012 laying down implementing rules for the airworthiness and environmental certification of aircraft and related products, parts and appliances, as well as for the certification of design and production organisations (recast) (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2012-748",
  "path": "annex/I/section/A/division/subpart+o/division/21.a.604",
  "kind": "division",
  "number": "21.A.604",
  "heading": "UKTSO authorisation for an auxiliary power unit (APU)",
  "text": "With regard to an UKTSO authorisation for an APU:\n(a) by way of derogation from points 21.A.8, 21.A.603, 21.A.610 and 21.A.621, the following points shall apply: points 21.A.15, 21.A.20, 21.A.21, 21.A.31, 21.A.33, 21.A.44, 21.A.47, 21.B.75 and 21.B.80. However, an UKTSO authorisation shall be issued in accordance with point 21.A.606 instead of a type-certificate;\n(b)by way of derogation from point 21.A.611, the requirements of Subpart D shall apply to the approval of design changes by the APU UKTSO 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 UKTSO authorisation shall be issued instead of a supplemental type certificate; and\n(c) the requirements of Subpart M shall apply to the approval of repair designs.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Substituted by Commission Delegated Regulation (EU) 2019/897 of 12 March 2019 amending Regulation (EU) No 748/2012 as regards the inclusion of risk-based compliance verification in Annex I and the implementation of requirements for environmental protection (Text with EEA relevance)."
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Word in Annex 1 point 21.A.604 substituted (31.12.2020) by The Aviation Safety (Amendment etc.) (EU Exit) Regulations 2019 (S.I. 2019/645), regs. 1, 206(6) (with Sch. 3) (as amended by S.I. 2019/1098, regs. 1(3), 12); 2020 c. 1, Sch. 5 para. 1(1)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Word in Annex 1 point 21.A.604(a) inserted (1.7.2024) by The Aviation Safety (Amendment) Regulations 2023 (S.I. 2023/588), regs. 1(3), 6(12)(a)(i)"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Word in Annex 1 point 21.A.604(a) substituted (1.7.2024) by The Aviation Safety (Amendment) Regulations 2023 (S.I. 2023/588), regs. 1(3), 6(12)(a)(ii)"
    },
    {
      "type": "F",
      "label": "F5",
      "text": "Word in Annex 1 point 21.A.604(a) inserted (1.7.2024) by The Aviation Safety (Amendment) Regulations 2023 (S.I. 2023/588), regs. 1(3), 6(12)(a)(iii)"
    },
    {
      "type": "F",
      "label": "F6",
      "text": "Substituted by Commission Delegated Regulation (EU) 2020/570 of 28 January 2020 amending and correcting Regulation (EU) No 748/2012 as regards the alignment of rules for continuing airworthiness of aircraft and aeronautical products, parts and appliances with Regulation (EU) No 1321/2014 (Text with EEA relevance)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2012/748/annex/I/section/A/division/subpart+o/division/21.a.604",
    "retrieved_at": "2026-11-01T14:49:15.996010+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}