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United States Department of TransportationUnited States Department of Transportation

AC 21-29D - Detecting and Reporting Suspected Unapproved Parts

Document Information

Detecting and Reporting Suspected Unapproved Parts
Date issued
Office of Primary Responsibility
AIR-600, Policy and Innovation Division

This advisory circular (AC) provides guidance to the aviation community for detecting suspected unapproved parts (SUP) and reporting them to the Federal Aviation Administration (FAA). Appendix A contains FAA Form 8120-11, Suspected Unapproved Parts Report, (with instructions) which serves as a standardized means of reporting. See appendix B for definitions specific to this AC.

  • AC 21-29D (PDF)
  • AC 21-29D with change 1 (PDF)

    A SUP report can no longer be initiated by calling. It has to be done by e-mail or mailed through the postal service.