Page 105 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

approval in dealing with any continuing airworthiness actions that are related to the
products, parts or appliances that have been produced;
(e) establish and maintain an internal occurrence reporting system in the interest of safety, to
enable the collection and assessment of occurrence reports in order to identify adverse
trends or to address deficiencies, and to extract reportable occurrences. This system
shall include evaluation of relevant information relating to occurrences and the
promulgation of related information;
(f) .
1. report to the holder of the type-certificate, restricted type-certificate or design
approval, all cases where products, parts or appliances have been released by the
manufacturer and subsequently identified to have deviations from the applicable
design data, and investigate with the holder of the type-certificate, restricted type-
certificate or design approval to identify those deviations which could lead to an
unsafe condition;
2. report to the CAA the deviations which could lead to an unsafe condition identified
according to point (1). Such reports shall be made in a form and manner
established by the CAA under point 21.A.3A(b)(2);
3. where the manufacturer acts as supplier to another production organisation, report
also to that other organisation all cases where it has released products, parts or
appliances to that organisation and subsequently identified them to have possible
deviations from the applicable design data.
21.A.129(a) GM Availability for inspection by the competent authority
Each product, part or appliance should be made available for inspection at any time at the request of
the CAA.
It is recommended that a pre-defined plan of inspection points be established and agreed with the
CAA to be used as a basis for such inspections.
The manufacturer should provide such documentation, tools, personnel, access equipment etc. as
necessary to enable the CAA to perform the inspections.
21.A.129(c) AMC1 Obligations of the manufacturer – Conformity of prototype models and test specimens
21.A.33 requires determination of conformity of prototype models and test specimens to the
applicable design data. For a complete aircraft a ‘conformity document’, that has to be validated by
the CAA, should be provided as part of the assistance to the design approval applicant. For products
other than a complete aircraft, and for parts and appliances, the CAA Form 1 validated by the CAA
may be used as a conformity document as part of the assistance to the design approval applicant.
21.A.129(c) AMC2 Obligations of the manufacturer – Conformity with Applicable Design Data
Individual configurations are often based on the needs of the customer and improvements or changes
which may be introduced by the type-certificate holder. There are also likely to be unintentional
divergences (concessions or non-conformances) during the manufacturing process. All these
changes are required to have been approved by the design approval applicant/holder, or when
necessary by the CAA.
21.A.129(c) AMC3 Obligations of the manufacturer – Condition for safe operation
Before issue of the Statement of Conformity to the CAA the manufacturer under this Subpart should
make an investigation so as to be satisfied in respect to each of the items listed below. The
documented results of this investigation should be kept on file by the manufacturer. Certain of these
items may be required to be provided (or made available) to the operator or owner of the aircraft, and,
for validation of the statement of conformity, to the CAA.
1. Equipment or modifications which do not meet the requirements of the state of
manufacture but have been accepted by the competent authority of the importing country.
2. Identification of products, parts or appliances which:
2.1 Are not new
2.2 Are furnished by the buyer or future operator (including those identified in 21.A.801
and 805).
3. Technical records which identify the location and serial numbers of components that have
traceability requirements for continued airworthiness purposes including those identified in
21.A.801 and 21.A.805.
4. Log book and a modification record book for the aircraft as required by the CAA.
5. Log books for products identified in 21.A.801 installed as part of the type design as
required by the CAA.
6. A weight and balance report for the completed aircraft.
7. A record of missing items or defects which do not affect airworthiness these for example
could be furnishing or BFE (Items may be recorded in a technical log or other suitable
arrangement such that the operator and CAA are formally aware).
8. Product support information required by other associated implementing rules and CS or
GM, such as a Maintenance Manual, a Parts Catalogue, or MMEL all of which are to reflect
the actual build standard of the particular aircraft. Also an Electrical load analysis and a
wiring diagram.
9. Records which demonstrate completion of maintenance tasks appropriate to the test flight
flying hours recorded by the aircraft. These records should show the relationship of the
maintenance status of the particular aircraft to the manufacturers recommended
maintenance task list and the Maintenance Review Board (MRB) document/report.
10. Details of the serviceability state of the aircraft in respect of, a) the fuel and oil contents, b)
provision of operationally required emergency equipment such as life rafts, etc.
11. Details of the approved interior configuration if different from that approved as part of the
type design.
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