Parts Rule Changes Hit Gazette One: Some key points of this rule change governing installation of parts

Parts Rule Changes Hit Gazette One Some key points of this rule change governing installation of parts By John Glavind On September 29, 2001, several changes to Canadian Aviation Regulations (CARs) Part V and the associated standards...

The procedure consists of two phases, one relating to the origin of the part, and the other to its physical condition. The origin element depends on knowing where the part was obtained, and a plausible explanation for not having applicable documentation. Examples include parts that have become separated from their documentation in storage, and parts that have been inadvertently mixed with like parts, all of which are known to have come from a reliable source, even though they are not individually identifiable. Where there is insufficient information to give reasonable confidence of having come from an authentic source, the part must be rejected.

Parts that have a reasonable origin must then be inspected and tested for condition and conformity to their applicable type design. The nature of the inspection will depend on the part. For simple parts, it could consist of visual and dimensional checks. With detailed parts it may be necessary to select samples at random for testing to destruction. Parts that are more complex may require a complete overhaul. Any defects found must be rectified and separately documented.

Approved Maintenance Organization (AMO) privileges
The re-certification process is only available to Approved Maintenance Organizations (AMOs) with documented procedures that have been approved by Transport Canada. The privilege will not be indicated by a rating, but by inclusion in the scope of limitations for the existing ratings. This will help to ensure that AMOs are only authorized to re-certify parts that fall within their particular area of expertise. The AMO's Maintenance Policy Manual must include the details of the process and the persons authorized to sign the resulting maintenance release. Signatories must be trained in the procedures, and must have at least five years' experience as an approved signatory.

These rule and standard changes will allow some increased flexibility within our regulatory structure. The definitions will add clarity and allow for reduced documentation on some basic parts. The interpretation of life-limited parts will reduce some of the burden on record keeping not required by other countries and help ensure parts beyond their limits are removed from circulation. The new parts tag and substitution rules will bring Canada in harmony with other authorities in addition to developing a system where a common form is used to verify compliance to type design. With the re-certification rules, industry will benefit in the availability of parts, which can be re-certified through an approved process. The level of safety is maintained through a documented and approved process within the AMO's maintenance policy manual. AMT

John Glavind is a Civil Aviation Safety Inspector for the Aircraft Maintenance and Manufacturing Branch in Ottawa. Comments or questions may be sent to him at

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