# 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), Division 21.A.604: UKTSO authorisation for an auxiliary power unit (APU)

Extent: E+W+S+N.I.

With regard to an UKTSO authorisation for an APU:
(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;
(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
(c) the requirements of Subpart M shall apply to the approval of repair designs.

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Source: https://www.legislation.gov.uk/eur/2012/748/annex/I/section/A/division/subpart+o/division/21.a.604 (the official version)
Page: https://openlegislation.uk/eu-regulation-2012-748/annex-I/section-A/division-subpart+o/division-21.a.604
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.