How long can a used part obtained from a source not subject to CARs remain in service without specific authorization from the minister?

• A. 30 days
• B. 60 days
• C. 90 days
• D. 120 days

Answer: (C)

A used part obtained from a source that is not subject to Canadian Aviation Regulations (CARs) can remain in service for a maximum of 90 days without requiring specific authorization from the minister. This provision is in place to ensure that the integrity and safety of aircraft components are maintained while allowing for a reasonable period during which the part can be evaluated for its condition and suitability for continued use.

When parts are sourced externally and used in aviation, it's crucial to assess their airworthiness and legality under the regulations. The 90-day period serves as a timeframe within which operators must either obtain the necessary authorization or take actions to ensure that the part complies with CARs. If the part is not properly evaluated or authorized by the end of the 90 days, it may not be considered compliant for continued use, thereby emphasizing the importance of adherence to aviation safety standards.