Page 157 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

g) If appropriate, date of expiry of the authorisation
h) Identification number of the authorisation.
The record may be kept in any format and should be controlled.
- Persons authorised to access the system should be maintained at a
minimum to ensure that records cannot be altered in an unauthorised manner
or that such confidential records do not become accessible to unauthorised
persons.
- Personnel should be given access to their own record.
- Under the provision of 21.A.257 the CAA has a right of access to the data held
in such a system.
- The organisation should keep the record for at least two years after a person
has ceased employment with the organisation or withdrawal of the
authorisation, whichever is the sooner.
21.A.243(d) GM2 Data requirements – Statement of the qualification and experience – Organisations that design minor
changes to type designs or minor repairs to products
For organisations that design minor changes to type design or minor repairs to products, the
statement of the qualifications and experience required by 21.A.243(d) should be addressed as
follows:
1. The nominated managers should be identified and their credentials submitted to CAA on
CAA Form 4 - DOA (see CAA website: in order that they may be seen to be appropriate in
terms of relevant knowledge and satisfactory experience related to the nature of the
design activities as performed by the organisation.
2. The persons responsible for:
- classifying changes to type designs or repairs;
- verifying compliance (21.A.239(b));
- approving minor changes to type design and minor repairs (21.A.263(c)(2));
- issuing information or instructions (21.A.265(h)),
should be selected by the organisation in accordance with a procedure and criteria agreed
with CAA.
21.A.245 Approval requirements
The design organisation shall demonstrate, on the basis of the information submitted in accordance
with point 21.A.243 that, in addition to complying with point 21.A.239:
(a) the staff in all technical departments are of sufficient numbers and experience and have
been given appropriate authority to be able to discharge their allocated responsibilities and
these, together with the accommodation, facilities and equipment, are adequate to enable
the staff to achieve the airworthiness, operational suitability and environmental protection
objectives for the product;
(b) there is full and efficient coordination between departments and within departments in
respect of airworthiness, operational suitability and environmental protection matters.
21.A.245 AMC1-ELA Approval requirements
The organisation demonstrates adequate staffing, infrastructure, access to facilities and discharge of
responsibilities by means of the continued ability to certify type designs after it has ensured that there
is positive compliance with the applicable type-certification basis, the operational suitability data
certification basis and the environmental protection requirements. Adequate staffing is observed on
the basis of reasonable workload, working time and project completion times.
The applicant should have access to:
1. workshops and production facilities that are suitable for manufacturing prototype models
and test specimens; and
2. accommodation and test facilities that are suitable for carrying out the tests and
measurements needed to demonstrate compliance with the certification specifications
and the environmental protection requirements. The test facilities may be subject to
additional technical conditions related to the nature of the tests performed.
The HDO for which an application for approval has been made has the direct or functional
responsibility for all the departments of the organisation that are responsible for the design of the
product. If the departments responsible for the design are functionally linked, the HDO still has the
ultimate responsibility for the compliance of the organisation with Subpart J.
The function of the head of airworthiness (HoA) should be established with a direct reporting line to
the HDO, and the person who fulfils this function is required to have a direct contract with the DO.
Responsibilities for all the tasks related to type investigations should be assigned in such a way that
there are no gaps in authority.
Combinations of responsibilities are acceptable where:
3. the role of the HDO may be fulfilled by the chief executive (CE) of the legal entity, who may
also fill the role of the AM within a parallel POA;
4. the HDO and the HoA are the same person, provided that the person has the competence
to fulfil both functions;
5. the HoA and the ISM are the same person, provided that the ISM assessment of working
activities that directly affect the person in their second role is conducted by another
independent person, on behalf of the ISM;
6. the HDO and the ISM are the same person, provided that the auditing activity is conducted
by another independent person, under the responsibility of the ISM;
7. external persons are acceptable for all or for parts of the role of the ISM;
8. a part-time HoA is acceptable, provided that the person is directly involved in the DOA, and
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