Page 99 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

21.A.124 Application
(a) Each application for an agreement to the showing of conformity of individual products,
parts and appliances under this Subpart shall be made in a form and manner established
by the CAA.
(b) Such application shall contain:
1. evidence which demonstrates, where applicable, that:
(i) the issuance of a production organisation approval under Subpart G would be
inappropriate; or
(ii) the certification or approval of a product, part or appliance under this Subpart
is needed pending the issuance of a production organisation approval under
Subpart G;
2. an outline of the information required in point 21.A.125A(b).
21.A.124(a) GM Application – Application form
The CAA Form 60 (see AMC 21.B.120(c)(1)) should be obtained from the CAA and completed by the
applicant.
An application may be accepted from:
- An individual applying on his or her own behalf, or
- In the case of an organisation, an individual with the authority to make agreements on
behalf of the organisation.
The completed form should be forwarded to the CAA.
21.A.124(b)(1)(i) GM Applicability – Inappropriate approval under Subpart G
The issue of a letter of agreement of production under Part 21 Subpart F may be agreed by the CAA
when:
1. The applicant produces or intends to produce aeronautical products, parts and/or
appliances intended for airborne use as part of a type-certificated product (this excludes
simulators, ground equipment and tools), and
2. The CAA determines that Part 21 Section A Subpart G would be inappropriate, and
consequently Part 21 Section A Subpart F applies. The main difference between Part 21
Section A Subparts G and F is that Subpart G requires the existence of a Quality System
which provides the CAA with the necessary confidence to grant to the manufacturer the
privileges of certifying its own production. There are situations where a Quality System,
including independent monitoring and continuous internal evaluation functions, is not
justified and /or feasible. In making the determination that Subpart F may apply, the CAA
may take into account one or a combination of parameters such as the following:
- no flow production (infrequent or low volume of production).
- simple technology (enabling effective inspection phases during the manufacturing
process).
- very small organisation.
21.A.124(b)(1)(ii) GM Certification or approval needed in advance of the issue of a POA
In cases where Part 21 Section A Subpart G is applicable, but when some time is needed for the
organisation to achieve compliance with Subpart G, i.e., to establish the necessary documented
quality system, the CAA may agree to use Part 21 Section A Subpart F for a limited period (transient
phase).
In cases where Part 21 Section A Subpart G is applicable, such as to produce UKTSO articles, a
letter of agreement to produce under Part 21 Subpart F should not be given unless an application has
been made for organisation approval under Subpart G, and reasonable progress is being made
towards compliance with Subpart G. Long-term production under Part 21 Subpart F will not be
permitted.
21.A.124(b)(2) GM Application – Minimum information to include with the application
At this early stage, provision of the complete manual is not necessary, but at least the following items
should be covered:
1. Table of Contents of the Manual (including list of existing inspection system documents or
procedures)
2. Description of items to be manufactured (including intended quantities /deliveries)
3. List of possible suppliers
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