Part V - Standard 571 Appendix H - Process to Evaluate Undocumented Aircraft Parts

Canadian Aviation Regulations (CARs) 2017-2

Content last revised: 2002/03/01

(refer to paragraph 571.10(4)(u), Types of work Table)
(amended 2002/03/01)

The following numbers correspond to the sequence of steps illustrated in the flow chart:

1. Parts at receiving: Retain all historical documents, tags, invoices, and packing slips for evaluation.

2. Part Identification: Verify that the part has certification or sufficient documentation, or both as applicable, to ascertain that it is a genuine part (i.e. nomenclature, part number, serial number, time in service) and that the part corresponds to that documentation. If the part appears to be a used part, verify that the identity of the aircraft from which the part was removed is documented. Verify that the technical records indicate that the applicable Airworthiness Directives and equivalent applicable directives issued by a foreign civil aviation authority have been accomplished.

3. Stores: Complete incoming stock procedures and place in stores by following the procedures described in the company Maintenance Policy Manual (MPM).

4. Exceptions: Section 571.09 of the CARs limits the installation of used life limited parts to those for which a complete technical history is available. Therefore, parts of the following kinds that are considered undocumented at step 2, are not be further evaluated under this appendix:

(a) life-limited parts that are subject to limits on flying hours, landings, operating cycles or calendar time in service, or combinations thereof;

(b) parts that are required to be rejected in accordance with the instructions for continued airworthiness following an abnormal occurrence; or

(c) parts that are eligible for use in multiple applications with different operational limitations, or different limits on the time in service, which if exceeded would require rejection of the part.

5. Part considered authentic: Consider the following factors when evaluating the authenticity of the part:

(a) the origin of the part (i.e. was the part received from a reliable source?);

(b) documentation such as packing slip, manufacturer’s identification tag, identity of component from which the part was removed; and

(c) part nomenclature, part number, serial number, manufacturer’s identification marks or stamps found on the part.

6. Documentation: Record and retain evidence of all tasks accomplished throughout the process of ascertaining the authenticity of the part. Detail each step of the process up to and including certification.

7. Evaluation: Using all available information, conduct an inspection of the part in accordance with the instructions for continued airworthiness or available type design data, or with both as applicable, for the part. It may be necessary to evaluate the part by comparison with a known authentic part. The evaluation process may require the use of hardness tests to determine heat treatment of the material. Procedures may be required to determine various material processes that may have been conducted on the material such as shot peening. Test all primary structural parts to determine that they are of the same material and in the same material condition as the type design product, either by comparison with the type design data (e.g. drawings) or by conducting comparison tests with a known authentic part.

8. Fit form and function: Check each part for physical interface with integral parts (e.g. shape, size, dimensions, mass and other parameters uniquely characterizing the part) and check the actions that the part is to perform. Ensure that all dimensions are within published wear limits. Where wear limits are not published, ensure that the dimensions do not exceed known limits for new parts.

9. Conformity: Verify that the part conforms to all applicable characteristics.

10. Restoration: Inspect and test parts and assemblies to all methods and practices published for such parts.

11. Acceptability: The part is acceptable for certification when it meets all the requirements of the type design or instructions for continued airworthiness and approved procedures including inspection, overhaul and testing. Ensure that all Airworthiness Directives and equivalent directives issued by a foreign civil aviation authority applicable to the part are complied with.

12. Certification and supporting documents: If the part has been found acceptable under para. 11, fill out and sign a maintenance release, meeting the requirements of section 571.10 of the CARs, and provide any other supporting documentation that may be required such as calibration records and test results, and ensure the certification documents accompany the part.

13. Reject: Ensure that any part that has reached its life limit is rendered unusable, or that it is identified as unairworthy and kept segregated from airworthy parts, in accordance with section 571.09 of the CARs.

Flow Chart 

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