Page 232 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

urgency within less than three months, and should normally not exceed three in number.
2) Corrective action plan, including timescales, should have been accepted and should not
require an additional and specific follow-up audit by the CAA.
A record should be kept by the CAA and should be brought to the attention of the CAA on request for
standardisation purposes.
21.B.230 GM1-ELA Issue of certificate
The terms of approval, which identify the products or the categories of parts and appliances, or both,
for which the holder is entitled to exercise their privileges, will be described by the CAA using standard
terms, as follows:
The type and the model should not be listed within the terms of approval. They are provided within the
company’s manual (or the equivalent documentation).
Changes to the list of types and models are not, in themselves, considered to be changes in the
scope of work, and they should be coordinated with the CAA.
If the scope of work is related to a restricted type design in which the approval of the engine and/or
the propeller is included in the aircraft type design, the work associated with these engines and/or
propellers is included in the scope of work related to the aircraft. A separate scope related to the
engine and/or the propeller is not required.

21.B.235 Continued surveillance
(a) In order to justify the maintenance of the production organisation approval the CAA shall
perform continued surveillance:
1. to verify that the production organisation approval holder's quality system complies
with Section A Subpart G;
2. to verify that the organisation of the production organisation approval holder
operates in accordance with the production organisation exposition;
3. to verify the effectiveness of the production organisation exposition procedures; and
4. to monitor by sample the standards of the product, part or appliance.
(b) Continued surveillance shall be performed in accordance with point 21.B.220.
(c) The CAA shall provide through planned continued surveillance that a production
organisation approval is completely reviewed for compliance with this Annex I (Part 21)
during a period of 24 months. The continued surveillance may be made up of several
investigation activities during this period. The number of audits may vary depending upon
the complexity of the organisation, the number of sites and the criticality of the production.
As a minimum the holder of a production organisation approval shall be subject to
continued surveillance activity by the CAA at least once every year.
21.B.235 AMC1-ELA Continued surveillance
The CAA should determine whether there is continued conformity to the type design by assessing:
1. the adherence of the company to the procedures laid out in the quality system that is
referenced by the POE; and
2. a representative number of sample products at various stages of production.
Surveillance activities are:
1. planned activities to a schedule that are adequate for the size, product range and
production rate of the company, so as to ensure that there is a complete review within 24
months. To obtain the required complete review of the production organisation within 24
months, all the relevant stages of production should be audited once within this 24-month
period;
2. unplanned activities in response to unsafe situations that may be caused by a problem in
the production organisation, and that are significant enough to require a detailed
assessment that cannot be delayed until the next scheduled surveillance event.
21.B.235 GM1-ELA Continued surveillance
A sampling plan in support of the planned surveillance activity could, for example, include:
1. a (part of the) product with the modification (or change) incorporated;
2. the installation, testing, or operation of a major part or system;
3. the accuracy and the generation of the flight test report data;
4. the accuracy and the generation of the weighing report data;
5. an engine test bed run;
6. the traceability of production records as defined from the type design;
7. the accuracy and the generation of the statement of conformity data, and the associated
determination of safe operation;
8. the accuracy and generation of the CAA Form 1 data.
It is recommended that flexibility should be allowed in the sampling plan so as to:
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