AC 21-2D

Historical

Advisory circular · Export Airworthiness Approval Procedures

A newer version is currentThis is a historical version. AC 21-2L is the version in force, approved January 29, 2010.
Approved
January 15, 1980
Last reviewed
May 8, 2014
Family
AC 21-2 · 8 versions
Revision
D
14 CFR parts
21

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 22, 2025.

Show pages 122–133
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Appendix 2 SECTION 2 - SPECIAL REQUIREMENTS The following identifies those special administrative requirements which must be satisfied at the time of export (in addition to any U.K. Special Conditions) for a particular product to be eligible for U.K. registration, certification and/or airworthiness validation.

A. All Aircraft.

* (1) Statement of Build Standard. This statement to include the aircraft specification, changes in design (as required by U.K. Special Conditions) and a list of Service Bulletins incorporated in production.

The 1ist of Service Bulletin incorporation is to identify:

(1) Production versions of the Service Bulletins;

(11) Service Bulletin compliance;

(111) Alert Service Bulletin compliance.

(2) Modification Standard. This must include:

(1) Customer options incorporated;

(11) Equipment incorporated, including items of equipment not necessarily installed by the manufacturer;

(111) Service Bulletin compliance;

(iv) Alert Service Bulletin compliance.

(3) Export Certificate of Airworthiness.

The U.S. export Certificate of Airworthiness must list the status of compliance with U.K. Special Conditions including, by issue and date, those which have been complied with and those which have not.

(NOTE: Non-compliance with any U.K. Special Condition would not require a waiver from the U.K. nor preclude the issuance of a U.S. Export Certificate of Airworthiness since the U.K. is primarily concerned with the status of compliance).

(4) Airworthiness Directives. A declaration of compliance with all AD's issued by the FAA must be provided. Where optional means of compliance are offered, the means chosen shall be stated. There shall also be a declaration of compliance with CAA Additional Directives (available a FAA Regional Offices).

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Appendix 2

(5) A copy of the aircraft type certificate plus any applicable supplemental type certificates (STC). The STC's will be subject to CAA evaluation if not previously investigated.

(6) A list of defects to be rectified by the U.K. operator at the time of issue of the Export Certificate of Airworthiness, if any.

(7) Engine/Airframe/Auxiliary Power Unit logbooks.

** (8) Seating configuration approval document, where appropriate.

*** (9) Maintenance Review Board program, where applicable.

(10) Time/Life limitations.

* (11) Electrical load analyses.

* (12) Minimum equipment 11st.

* (13) Wiring Diagram.

(14) Weight schedule and weighing report.

(15) Manuals:

Number Required * (1) Flight Manual or Pilot Operating 5 (+1 for each Handbook aircraft) * (11) Maintenance 2 * (111) Operations 2 * (1v) Weight and Balance Loading Procedures 1 * (v) Overhaul 2 * (vi) Structural repair 2 * (vi1) Component overhaul 2 * (vi11) Engine maintenance and overhaul 2 * (1x) Standard practices 2 * (x) Nondestructive testing 2 * (x1) Structurally significant items 1 119

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Appendix 2 * (x11) Maintenance planning guide 1 * (x111) Parts Catalog 2

(16) Record of Compass System and Magnetic Compass Swings.

(17) Record of rigging checks.

(18) Detailed list of radio equipment constituting the radio station.

(19) Antenna performance patterns, when available.

(20) List of Serial Numbers of significant component parts, including serial numbers, which are not listed in (15), (xi11).

Used Aircraft. In addition to the information referred to in Section 2, paragraph A, the following is also required for used aircraft:

** (1) The maintenance program to which these aircraft have previously been maintained including:

(1) Previous check cycle;

(11) Future check cycle.

** (2) Component overhaul life summary, including details of service life remaining and modification standards.

(3) Compliance with structural inspection program. This to include details of any structural sampling program in which these aircraft have been included, together with details of their position in this program.

NOTE:

* Required only with first aircraft of a particular type and model exported to U.K.

** Normally only required for aircraft over 2,730 kg (6,019 1ba.)

in Transport Category.

*** Both of the foregoing apply.

C. Aircraft Parts

(1) Airworthiness Approval Tag (FAA Form 8130-3).

(2) Compliance with FAR 21 (Subpart L).

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Appendix 2 D. Engines/Propellers.

(1) Export Certificate of Airworthiness (FAA Form 8130-4);

(2) Compliance with FAR 21 (Subpart L);

(3) Statement of Service Bulletins complied with.

E. Engine/Propeller Parts.

(1) Airworthiness Approval Tag (FAA Form 8130-3);

(2) Compliance with FAR 21 (Subpart L).

F. Appliances (other than radios).

(1) Airworthiness Approval Tag (FAA Form 8130-3). The registration number assigned by the U.K. as evidence of design approval must be quoted on the tag;

(2) Compliance with FAR 21 (Subpart L).

G. Components.

(1) Conformity Certification Tag (FAA Form 8130-3);

(2) Compliance with FAR 21 (Subpart L);

(3) A statement of Service Bulletin compliance standard.

Radios.

(1) Airworthiness Approval Tag (FAA Form 8130-3) with CAA approval number quoted (ref. Section A, Chapter A3-4, British CAR's);

(2) Compliance with FAR 21 (Subpart L).

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Appendix 2 SECTION 3 - U.K. PROCEDURES FOR ACCEPTANCE OF APPLIANCES (OTHER THAN RADIO) A• GENERAL

(1) The CAA will accept that an appliance has those characteristics vouched for on an FAA Airworthiness Approval Tag which has a CAA registration number quoted. For the purpose of this procedure, an appliance means any instrument, equipment, mechanism, apparatus, or accessory used or intended to be used in operating an aircraft in flight, which 1s installed in, intended to be installed in, or attached to the aircraft, but is not part of an airframe, engine, or propeller, and includes replacement and modification parts therefor.

* (2) The procedures given in paragraph B below are acceptable in relation to those appliances for which CAA approval is required and which meet either of the following alternatives:

(a) The appliance has been accepted by the FAA as complying with the Minimum Performance Standards of the applicable Technical Standard Order published in FAR 37, or

(b) In lieu of approval under a Technical Standard Order, the appliance has been accepted by the FAA as meeting the applicable FAR's and the terms of the applicant's specifications.

(3) In the case of an appliance which does not require specific approval by the CAA, but approval is implied by certification of the aircraft in which the appliance is installed, sufficient information shall be supplied to the user.

* NOTE: Specific CAA approval is required for those appliances which require approval under the Air Navigation Order or appliances on which airworthiness depends but for which the aircraft constructor does not undertake full responsibility.

B. PROCEDURES. The following procedures are based upon a system of registration of the design with the CAA. The CAA will expect to recover from the applicant all costs involved in the acceptance of the appliance, including fees, subsistence, and traveling.

(1) Documentation required for each appliance offered for registration

(a)(1) CAA Form AD.70 (Attachment Enclosure 4) or letter requesting registration addressed to CAA, Redhill, with a copy to the appropriate FAA Regional Office.

(11) The FAA will then forward a supporting letter to the CAA on the lines of Attachment (ref. example letter, Enclosure 3).

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Appendix 2

(b)(1) A statement of the appropriate Section of FAR Part 37 with which the appliance complies or.

(11) In cases not covered by FAR 37, a copy of the specification which the appliance complies.

(c) A general arrangement drawing and such descriptive information as will define the appliance sufficiently for the CAA to be able to determine any U.K. additional requirements defined in paragraph B.(2). (Note: This may include physical examination of the appliance).

(d) A Declaration of Design and Performance, as required by BCAR Chapter A3. (ref. Enclosure 1).

(e) Type test evidence showing conformance with FAR Part 37 or the specification with which the appliance complies when requested by the CAA.

(f) A copy of each Maintenance, Overhaul, and Repair Manual and a copy of Service Bulletins and the Installation Manual where appropriate. Revision service must be provided.

(g) A statement of conformance (ref. Enclosure 2) signed by the applicant certifying that:

(1) The appliance meets the appropriate FAA requiremente with any agreed and stated exceptions.

(11) The appliance will be manufactured under the quality control procedures specified in FAR 21.143.

(111) The CAA will continue to be advised of any modifications affecting the airworthiness of the appliance.

(h) A copy of the FAA letter of design approval for the particular appliance.

(2) Notification of U.K. Additional Requirements

(a) After examination of the documentation required by paragraph B.(1), the CAA will determine whether any U.K. additional requirement should be complied with in order to obtain CAA registration.

(b) Such U.K. additional requirements will be kept to a minimum and will be those found necessary to:

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Appendix 2

(1) Provide a level of safety equivalent to that provided for by U.K. requirements and practice and as are necessary to comply with the Air Navigation Order.

(11) Cover features not otherwise covered by existing requirements and practices. (NOTE: This includes such matters as details of instrument presentation).

(c) In order to determine U.K. additional requirements, the CAA may ask for such failure analyses as are necessary to determine an equivalent level of safety.

(d) In the event that U.K. additional requirements are deemed appropriate, the applicant and the FAA will be so advised.

applicant must then submit an amended Statement of Conformance additionally certifying that the prescribed U.K. additional requirements have been This statement must be accompanied by a letter from the FAA which certifies that FAA design approval for the particular appliance, including the prescribed U.K. additional requirements, has been granted.

(3) Registration

(a) Upon CAA acceptance of the documentation required by paragraph B.(1), and also when applicable, their receipt of satisfactory additional statements as required by paragraph B.(2)(d), the appliance will be registered by the CAA as being approved for use within the limitations of the Declaration of Design and Performance (DDP). The registration will only apply to the applicant, at his address at the time of registration.

(b) The applicant will normally deal directly with the CAA throughout the registration process. The CAA will provide FAA with copies of correspondence relating to only U.K. additional requirements which they may impose and to the final acceptance of the items.

(4) Acceptance of Individual Appliances. Individual appliances of a type registered in accordance with this procedure will be accepted by the CAA on the basis of an Airworthiness Approval Tag (FAA Form 8130-3) issued by the FAA. The FAA certification may be made on behalf of the FAA by the applicant, if this authority has been delegated to the applicant by the FAA, and the FAA assumes full responsibility for the certification.

The registration number issued by the CAA shall be quoted on the Airworthiness Approval Tag.

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Appendix 2 Enclosure 1 - (see Examples l and 2)

DECLARATION OF DESIGN AND PERFORMANCE A standard form of Declaration of Design and Performance is given in British Standard 2G.100: Part 1, entitled "Declarations, Identifications and Construction," and this will require to be adapted according to the nature of the equipment. The declaration shall contain the following information:

(1) Particulars identifying the equipment and its design standard and including reference to the specification(s) to which it is designed.

(11) The rated performance of the equipment, either directly or by reference to other supplementary documents where necessary.

(111) The degree of compliance with the requirements stating the issue number of the section concerned.

(1v) Reference to relevant test reports.

(v) Any limiting conditions applying to its use. This shall include limitations implicit in the design (e.g., working and ultimate pressure or loads, rating working and maximum voltage and current accuracy of instruments), declarations required by the governing specifications and the ability of the equipment to work under various ambient conditions

(e.g., acceleration, vibration, temperature, altitude and humidity).

NOTE: for example, an item of electrical equipment may require the following Information:

(a) Voltage range.

(b) Frequency range.

(c) Time rating and duty cycle.

(d) Altitude and temperature range appropriate to rating.

(e) Climatic test classification and waterproofness grade as defined in BS.2G.100.

(f) Vibration grading, acceleration class and grade, explosionproofness category, fire resistance classification, compass safe distance, and whether radio-interference free.

(g) Minimum life or overhaul period in hours or cycles of operations.

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(h) Restrictions in mounting attitude.

(1) Fluid resistance.

(j) Any departures from the governing specifications.

The Declaration shall bear the following statement made and signed by the chief designer or his designated representative:

iI hereby certify that the information contained in this Declaration

of Design and Performance is accurateLimited

cannot accept responsibility for the satisfactory operation of equipment used outside the conditions given above without their agreement."

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Appendix 2 EXAMPLE 1 Of ENCLOSURE 1 - AVIONIC TYPE EQUIPMENT NAME AND ADDRESS D.D.P. NUMBER. . .

OF MANUFACTURER REVISION NO. • CAA APPLIANCE REGISTRATION REF. • • • • • (WILL BE ISSUED BY CAA) (THE ABOVE THREE

ITEMS TO BE PROVIDED BY THE APPLICANT)

DECLARATION OF DESIGN AND PERFORMANCE OF

NAME OF EQUIPMENT

DESCRIPTION Weight Overall Dimensions Design Specification Number Drawing Schedule Number Production Test Specification Number Modification Standard Wiring Diagram Number Installation Drawing Number Service and Instruction Manual Reference Approval Test Reports Ref. Nos.

Any Certificate of Declaration Bearing on this Approval 127

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Appendix 2 EXAMPLE 1 of ENCLOSURE 1 cont'd LIMITING CONDITIONS OF USE:

Voltage Range: Power Requirements:

Frequency Range:

Ambient Temperature Range:

Climatic Grading:

Altitude Rating:

Vibration Grade:

Acceleration Grade:

Radiated R.F. Interference:

Magnetic Effect:

Flameproofness:

Compass Safe Distance:

Endurance:/Overhaul Period:

Mounting Attitude:

Departures from Specification:

Special Limitations:

Intended Use:

I hereby certify that....... • . . .

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Appendix 2 EXAMPLE 2 of ENCLOSURE 1 - PASSENGER SAFETY TYPE EQUIPMENT NAME AND ADDRESS D.D.P. NUMBER. .

OF MANUFACTURER REVISION NO. • • APPLIANCE REGISTRATION REF.

(TO BE ISSUED BY CAA) (THE ABOVE THREE

ITEMS TO BE PROVIDED BY THE APPLICANT)

DECLARATION OF DESIGN AND PERFORMANCE OF

NAME OF EQUIPMENT

DESCRIPTION Overall Dimensions:

Design Specification No.:

Production Test Specification No.:

Modification Standard:

Drawing Schedule No.:

Service and Instruction Manual:

Approval Test Reports:

Any Certificate of Declaration Bearing on this Approval:

Test Factor Used:

Degree of compliance with BCAR:

Limiting Conditions of Use:

Acceleration Grade:

Mounting Attitude:

Departures from Specifications:

Special Limitations: I hereby certify that: • • • • Intended Use: