Page 186 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

21.A.605 Data requirements
(a) The applicant shall submit to the CAA the following documents:
1. a certification programme for the UKTSO authorisation, setting out the means to
demonstrate compliance with point 21.A.606(b);
2. a statement of compliance certifying that the applicant has met the requirements of
this Subpart;
3. a declaration of design and performance (DDP), stating that the applicant has
demonstrated that the article complies with the applicable UKTSO in accordance
with the certification programme;
4. a copy of the technical data required in the applicable UKTSO;
5. the exposition, or a reference to the exposition, referred to in point 21.A.143 for the
purpose of obtaining an appropriate production organisation approval under Subpart
G or the manual, or a reference to the manual, referred to in point 21.A.125A(b) for
the purpose of manufacturing under Subpart F without production organisation
approval;
6. for an APU, the handbook, or a reference to the handbook, referred to in point
21.A.243 for the purpose of obtaining an appropriate design organisation approval
under Subpart J;
7. for all other articles, the procedures, or a reference to the procedures, referred to in
point 21.A.602B(b)(2);
(b) The applicant shall report to the CAA any difficulty or event encountered during the
approval process that may significantly impact the UKTSO authorisation.
21.A.605(a)(1) AMC Certification programme
(a) For the purpose of the compliance demonstration in accordance with point 21.A.606(b),
the applicant should:
(1) establish a certification programme;
(2) submit the certification programme to the CAA; and
(3) keep the certification programme updated during the authorisation process.
(b) The certification programme should contain the following information:
(1) a detailed description of the relevant UKJ technical standard order (UKTSO) article,
including all of its configurations to be certified, and the identification of UKTSO and
non- UKTSO functions, if any;
(2) the applicable CS-UKTSO, in case of different minimum performance standard
(MPS) available, the selected MPS, the other requirements and any optional aspects
(applicable standards, applicable requirements, choice of classes (if applicable)) as
well as the expected deviations;
(3) the operating characteristics and the expected limitations;
(4) the intended use of the article and the kind of operations for which the approval is
requested;
(5) the proposed means of compliance, including the list of documents and deliverables
for the CAA;
(6) an overview of the safety assessment for the functions supported by the article,
including the main failure conditions, their classification, the associated
assumptions, and architectural features supporting the safety aspects;
(7) the way in which the applicant will record the justifications of compliance; and
(8) a project schedule, including major milestones.
21.A.605(b) GM Reporting from the compliance demonstration process and updates to the certification programme
The applicant should report to the CAA any unexpected difficulty or event encountered during the
compliance demonstration which invalidates or appreciably affects the assumptions previously made,
e.g.:
1. an increase in the severity of the consequences of a certain condition (e.g. a failure mode)
of the article;
2. one or more significantly reduced margins on the ‘pass-fail’ criteria of the compliance
demonstration;
3. an unusual interpretation of the results of the compliance demonstration;
4. a deviation from the agreed means as defined in the certification programme;
5. a change to the conditions set out in the AMC No 2 to 21.B.100(b); and
6. any potential deviations discovered by the applicant.
The applicant should also evaluate whether the unexpected difficulty or event encountered will impact
on the certification programme and, if necessary, they should amend the certification programme as
per point 21.A.603.
21.A.606 Requirements for the issuance of an UKTSO authorisation
In order to be issued an UKTSO authorisation, the applicant shall:
(a) demonstrate its capability in accordance with point 21.A.602B;
(b) demonstrate that the article complies with the technical conditions of the applicable
UKTSO or with deviations therefrom approved in accordance with point 21.A.610, if any;
(c) comply with the requirements of this Subpart; and
(d) declare that no feature or characteristic has been identified that may make the article
unsafe for the uses for which certification is requested.
21.A.606(d) AMC Declaration
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