Part V - Standard 571 Appendix J - Authorized Release Certificate

Canadian Aviation Regulations (CARs) 2017-2

Content last revised: 2008/12/30

(Refer to section 571.10 of this standard)
(amended 2008/12/30; previous version)

The Authorized Release Certificate described in this Appendix conforms to a standardized, internationally recognized format for the release of both new and used (maintained) aeronautical products (herein also referred to as items or parts). When used to certify the maintenance of used parts, it forms a means for issuance of the maintenance release required by CAR 571. When used to certify new parts, it provides a means for issuance of the statement of conformity required by CAR 561.

These instructions relate only to the use of the Authorized Release Certificate as a maintenance release for parts maintained by Canadian Approved Maintenance Organizations (AMOs). For the requirements applicable to the release of parts maintained under the jurisdiction of other national authorities, refer to the applicable foreign regulations.

For the certification of new parts, refer to CAR 561 and the associated standards.

The Authorized Release Certificate (hereinafter referred to as “certificate”) is not an official Transport Canada form, but rather a template that may be used by industry organizations for the development of their own certificates. Subject to the conditions outlined in this Appendix, organizations may design their own certificates from scratch, or copy the blank examples and modify them as necessary. Blank samples may also be downloaded from the Transport Canada web site, where they are available in both *.xls and *.pdf formats.

Purpose and Use

The primary purpose of the certificate is to certify that an aeronautical product has been maintained in accordance with the applicable airworthiness requirements.

The certificate may be used for items intended for installation on foreign aircraft, as well as for domestic purposes. It is considered to be valid worldwide but acceptance of the items certified on it will be dependent upon the regulations of the national civil aviation authority concerned and on compliance with the terms of any applicable bilateral agreement or technical arrangement between that authority and Transport Canada. When using the certificate to satisfy such special conditions, compliance must be certified according to the requirements of the applicable agreement or arrangement. The certificate is not a delivery or shipping note.

While the Canadian version of the certificate is not an official Transport Canada form, it has been allocated the title FORM ONE for harmonized international identification purposes. This title replaces the previous designation 24-0078.

Maintenance releases using the certificate may only be issued by AMOs approved by Transport Canada, and only for work performed directly under their control and within the scope of their approval. Aircraft are not to be released using the certificate.

The certificate does not constitute approval to install the maintained item(s) on a particular aircraft, engine, or propeller but helps the end user determine the item’s airworthiness approval status.

A mixture of new and used items is not permitted on the same certificate.

General Format

The certificate must comply with the format shown in the following examples, including block numbers and the location of each block. The size of the blocks may vary to suit the individual application, but not to an extent that would make the certificate unrecognizable. The certificate must be in “landscape” format, but the overall size may be significantly increased or decreased so long as the certificate remains recognizable and legible. If in doubt, consult with Transport Canada.

All printing must be clear and legible to permit easy reading.

The certificate may either be pre-printed or computer generated, but in either case the printing of lines and characters must be clear and legible. Pre-printed wording is permitted in accordance with the examples, but no other certification statements are permitted. The preprinted statements on the certificate must appear in either English or French. Bilingual or multilingual formats may be used, provided one of the languages is either English or French.

The details to be entered on the certificate may be either machine/computer printed or hand-written using block letters and must permit easy reading. Abbreviations should be restricted to a minimum.

The user/installer responsibility statements may be placed on the bottom margin or on the reverse side of the certificate. The space remaining on the reverse side of the certificate may be used by the originator for any additional information but must not include any certification statement.


The certificate must accompany the items described and correlation must be established between the certificate and the item(s). A copy of the certificate must be retained by the organization that raised it. Where both the certificate format and the data are entirely computer generated, retention by means of secure database is acceptable provided it is possible to generate a hard copy on request.

There is no restriction on the number of copies of the certificate sent to the customer.

The certificate may be attached to the certified item directly, or may be placed in an envelope for protection and the envelope attached to the item.

Lost Certificate:

A request for the replacement of a certificate declared lost must come from the owner of the item. A file copy of the original certificate should be provided to the owner. The replacement certificate serves as a historical record and not as a statement of the item’s current condition.

Errors On A Certificate:

If an end user finds one or more errors on a certificate, they must identify them in writing to the originating AMO. Originators may issue a corrected certificate provided they can verify and correct the errors. The corrected certificate must have a new tracking number, signature and date.

The corrected certificate must contain an original signature in block 14b and the current date the signature is appended in block 14e.

A request for a corrected certificate may be honoured without verification of the item’s condition, but a corrected certificate is not a statement of current condition and should include an explanation in block 12, including a reference to the previous certificate. Both certificates should be retained according to the retention period applicable to the first certificate.

The corrected certificate serves as a historical record and not as a statement of the item’s current condition.

Completed Certificate

Refer to Figure 2 for an example of an appropriately completed certificate. When filling in the certificate, all entries must be in either English or French, and either typed or clearly printed in block letters in permanent ink. All blocks must be completed. Inapplicable items must be either marked “N/A” or struck out.

Once completed, the Authorized Release Certificate becomes part of the technical record for the item to which it relates, and eventually will become part of the technical record of the next higher assembly on which that item is installed. The certificate is therefore subject to all the applicable regulations related to maintenance and technical records.

Completion of Certificate by the Originator

Block 1 – Approving Civil Aviation Authority (CAA) /Country

Block 1 is reserved for the name and country of the Civil Aviation Authority under whose jurisdiction this certificate is issued. The entry “Transport Canada” satisfies both requirements and is the only entry that may be made in respect of items maintained under Canadian regulations. This text may be pre-printed on blank certificates.

Block 2 Title block – The title “AUTHORIZED RELEASE CERTIFICATE —FORM ONE” should be pre-printed on the blank certificate, so no further entry is required in this block.

Block 3 – Form Tracking Number

Enter the unique number established by the numbering system/procedure of the AMO identified in block 4; this may include alpha/numeric characters. The originating organization must establish a tracking system to correlate the certificates with information on the released parts.

Block 4 – Organization Name and Address

Enter the full name and address of the AMO releasing the item (s) covered by the certificate. Logos, etc., of the organization are permitted if they can be contained within the block. This information may be pre-printed on the blank certificates.

Block 5 – Work Order/Contract/Invoice

To facilitate traceability of the items, where applicable enter the customer’s work order number, contract number, invoice number, or similar reference; if none of these are applicable, enter “N/A”.

Block 6 – Item

The block is provided to permit easy cross-reference to other blocks, preventing ambiguity by the use of line item numbers. Block 6 must be completed where there is more than one line item and reference to the items is made in other blocks. Where necessary, it is permissible to add lightly ruled lines to aid in separating the information relating to each line number

Block 7 – Description

Enter the name or description of the item. In the case of multiple items, enter the description for each item number listed in block 6. Preference should be given to the term used in the Instructions for Continued Airworthiness (Illustrated Parts Catalogue, Aircraft Maintenance Manual, Service Bulletin, etc).

Block 8 – Part Number

Enter the part number as it appears on the item (or tag/packaging). In the case of an engine or a propeller, the type designation may be used. In the case of multiple items, enter the description for each item number listed in block 6.

Block 9 – Quantity

State the quantity of each item. In the case of multiple items, enter the quantity of each item number listed in block 6.

Block 10 – Serial/Batch Number

If the item is required by the applicable design data to be identified with a serial number or equivalent identification, enter it in block 10. If no serial number or equivalent identification is applicable, a batch number or other equivalent unique identifying number may be entered. If no unique identifying number is available, enter “N/A”.

Block 11 – Status/Work

The following table describes the permissible entries for block 11. Do not use any other terms. Enter only one of the terms listed. Where more than one of the terms is applicable, use the one that most accurately describes the majority of the work performed. For example, where an overhaul was carried out, and modifications and / or repairs were conducted as part of the overhaul, simply enter “Overhauled.” Where necessary, more detailed explanations of the work done shall be entered in block 12 and on referenced supporting documents.

Entry Meaning
Overhauled The item has undergone a restoration process that ensures it is in complete conformity with the applicable service tolerances specified in the Type Certificate holder’s Instructions for Continued Airworthiness, or equivalent data acceptable to the Minister.

As a minimum, it must have been disassembled, cleaned, inspected, repaired as necessary, reassembled (using replacement parts where required) adjusted as required and tested, and found to conform to the above specified data.
Repaired Deficiencies in the item have been rectified as described in block 12, and in relation to those deficiencies*, the item has been restored to an airworthy condition.
Inspected / Tested The item has been examined, tested, measured, etc., in accordance with an applicable standard.** Includes visual inspections, functional and operational tests, calibration and bench checks.
Modified Alteration of an item to conform to an applicable standard.**

*  Note: A maintenance release for a repair only attests to the condition of the item with relation to the repair itself, not to the condition of the item as a whole. If any other deficiencies are known to exist or other maintenance tasks are outstanding, details must be entered in block 12.

** Note: In this context, applicable standard means a particular design or maintenance standard, method, technique or practice that is approved by or acceptable to the authority having jurisdiction over the item concerned.

Block 12 – Remarks

Enter in this block, either directly or by reference to supporting documentation, any information necessary for the user or installer to determine the airworthiness of an item. If necessary, a separate sheet may be used and referenced in this block.

In particular, enter details of any outstanding work required on or before installation of the item. If the item has been made or configured solely in accordance with specifications approved by a foreign airworthiness authority, and for some reason does not comply with Canadian requirements, include a statement to that effect.

Include any other information necessary to enable the installer to determine the condition and conformity of the item. Each statement must be clearly identified as to which item in block 6 it relates. If there is no statement, state “None”.

Some examples of statements to be entered in block 12 are:

1. Reference to the maintenance data used, including revision status where applicable.

2. Reference to Airworthiness Directive or Service Bulletin compliance.

3. A description of any repairs carried out.

4. Details of modifications incorporated, including reference to the applicable approved data. Where applicable, this must include reference to foreign approvals.*

5. List of replacement parts installed.

6. Status of any life limited parts.

7. Details of any deviations from the customer work order.

8. Details of any outstanding tasks or known deficiencies still to be rectified.**

9. Any release statements or regulatory references needed to satisfy a foreign airworthiness authority maintenance requirement.

* Note: When working for foreign clients, cases may arise where work is performed to data approved by the foreign authority, but not approved by the Minister. This is acceptable, provided both the data and the approving authority are accurately specified in block 12. In such cases, the items would not be acceptable for installation on Canadian aircraft, but would still be eligible for the applicable foreign installation.

** Note: When an item undergoes sequential maintenance tasks in different organizations before it is installed in an aircraft or other higher assembly, each organization issuing an Authorized Release Certificate shall attach the previous certificates to the item along with its own. All the certificates for the various tasks must accompany the item to its final destination, and will be included in the technical record for the aircraft or other higher assembly on which the part is eventually installed.

Blocks 13a through 13e

These blocks are reserved for the certification of new parts by an approved manufacturer, and are not used for a maintenance release. AMOs should shade, darken, or otherwise mark this area on the pre-printed blank certificates, to preclude inadvertent or unauthorized use.

Block 14a

1. Mark the appropriate box or boxes to indicate under which regulations the completed work is being certified.

2. Work performed in accordance with the CARs (including work done for foreign clients) should always be indicated by checking the box “CAR 571.10 Maintenance Release”*

3. In addition, where work is certified in accordance with foreign requirements (such as Bilateral Agreements or Technical Arrangements that call for Maintenance Policy Manual Supplements) it must also be indicated by marking the “Other regulation specified in block 12” box. The applicable foreign regulations should be stated in block 12. Note that this reference is in addition to the identification of any approved design data that may also have to be entered in this block.

* Note: Work done to foreign approved data, even where that data is not approved by the Minister, may still be certified by means of a CAR 571.10 maintenance release, provided the work was performed in accordance with the Canadian Aviation Regulations (e.g., CAR 571 and 573) and the applicable Bilateral Agreement or Technical Arrangement.

Block 14b - Signature

This space shall be completed with the signature of the authorized person. Only persons specifically authorized by the certificate holder in accordance with CAR 573 are permitted to sign this block. To aid recognition, a unique number identifying the authorized person may be added. Alternatives to a hand-written signature (such as a computer-generated signature facsimile) are only permitted when authorized by Transport Canada.

Signature in this block constitutes a maintenance release pursuant to CAR 571.10.

Block 14c – Approved Organization Number

Enter the approved organization number that identifies the AMO certificate issued by the Minister.

Block 14d – Name

Enter the name of the person signing Block 14b, printed, typed, or written in a legible form.

Block 14e - Date

Enter the date on which Block 14b is signed, using the format dd/mmm/yyyy (dd = 2 digit day, mmm = first 3 letters of the month, yyyy = 4 digit year).

Bottom margin or reverse side of certificate

Place the following statement on the pre-printed blank certificates to notify end users that they are not relieved of their responsibilities concerning the installation and use of any item accompanied by the form:

Installer Responsibilities

“This certificate does not constitute authority to install.

Installers working in accordance with the national regulations of a country other than that specified in block 1 must ensure that their regulations recognize certifications from the country specified.

Statements in blocks 13a or 14a do not constitute installation certification. In all cases, the technical record for the aircraft must contain an installation certification issued in accordance with the applicable national regulations before the aircraft may be flown.”


Figure 1 – Authorized Release Certificate

Figure 2 – Example of completed release certificate

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