Page 139 - UK Regulation Part 21 Initial Airworthiness Annex I (consolidated) March 2022

PART 21 - INITIAL AIRWORTHINESS (ANNEX I)

typecertificate.
Exemptions for new engines should be processed and approved by the CAA,
in agreement with the CAA, for both the manufacture of the exempted
engines and the initial operator of the aircraft to which they are to be fitted.
Given the international nature of aviation, the CAA should attempt to
collaborate and consult on the details of exemptions. In the case where
engine type certification is done through a reciprocity agreement between the
CAA and Third Countries, the CAA should coordinate on the processing of
exemptions and concur before approval is granted.
c) Other engines
Unlimited exemptions may be granted for continued production of spare
engines having emissions equivalent to or lower than the engines they are
replacing.
Engines for use on aircraft excluded from the scope of the Basic Regulation
i.e. aircraft specified in Annex II to the Basic Regulation and aircraft involved in
activities referred to in Article 1(2) of the Basic Regulation (e.g. military,
customs, police, search and rescue, fire fighting, coastguard or similar
activities or services) are excluded from civil aircraft NOx production cut off
requirements.
2.3 Rejection of request
If the CAA rejects the request for exemption, the response should include a detailed
justification.
21.A.165(c)(3) GM Definitions of engine type certification date and production date
Volume II of Annex 16 to the Chicago Convention contains two different references to applicability
dates:
1. ‘Date of manufacture for the first individual production model’ which refers to the engine
type certification date; and
2. ‘Date of manufacture for the individual engine’ which refers to the production date of a
specific engine serial number (date of Form 1).
The second reference is used in the application of engine NOx emissions production cut-off
requirement which specifies a date after which all in-production engine models must meet a certain
NOx emissions standard.
21.A.165(c)(3) includes the production requirements and refers to paragraphs (b) and (d) of Volume II,
Part III, Chapter 2, paragraph 2.3 of Annex 16 to the Chicago Convention.
21.A.165(c)(4) AMC Applicable aeroplane CO2 emissions requirements
1. General
This determination is made according to the data provided by the aeroplane type
certificate holder. This data should allow the determination of whether the aeroplane
complies with the CO2 emissions applicability requirements of Annex 16 to the Chicago
Convention, Volume III, Part II, Chapter 2, paragraph 2.1.1.
It should be noted that the CAA has the possibility to grant exemptions as noted in Volume
III, Part II, Chapter 1, paragraph 1.11 and Chapter 2, paragraph 2.1.3.
21.A.165(d) AMC1-ELA Obligations of the holder – Recording and archiving system
The POA holder should establish (in coordination with the design holder) which details are to be
recorded to support the production process and to assist the design holder in dealing with continued
airworthiness matters. The level of detail chosen for the production process records can have a
substantial impact on the scope of any corrective actions.
21.A.165(d);(h) AMC1-ELA Obligations of the holder – Recording and archiving system
Records of production that have been used to determine conformity with the type design, such as
those records mentioned in relation to point 21.A.165(c) and (d), should be archived and preserved
using an adequate archiving method that should be defined within the company manual. Those
records need to be held at the disposal of the CAA, and need to be retained in order to provide the
information necessary to ensure the continuing airworthiness of the products, parts or appliances.
All forms of recording media are acceptable (paper, database, etc.), provided that the preservation of
the records for the retention period for archiving can be ensured.
The production organisation should:
1. define the records to be retained. If the type design defines which data needs to be
recorded, the production organisation is not required to go beyond this data;
2. implement a structured method of archiving. If IT-based ERP systems with workflow
management are used, a detailed description of the system is not required;
3. ensure that there is effective protection of the records from deterioration or accidental
damage, e.g. by holding hard and soft copies in separate locations;
4. ensure the continued readability of the records by selecting an adequate method of
archiving;
5. define a retention period for each type of data, taking into account that the determination of
conformity is subject to the following:
- data which supports the conformity of a product, part or appliance should be kept
for not less than 3 years from the issue date of the related statement of conformity
or authorised release certificate;
- data considered to be essential for continuing airworthiness should be kept
throughout the operational life of the product, part or appliance.
If the production organisation has decided that the records of any partner, supplier or subcontractor
do not need to be supplied to the production organisation, then the production organisation should
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