SUP-Related Advisory Circulars

Detecting and Reporting Suspected Unapproved Parts, AC 21-29 (PDF)
Eligibility and Evaluation of U.S. Military Surplus Flight Critical Aircraft Parts, Engines, and Propellers, AC 20-142 (PDF)
Eligibility, Quality, and Identification of Approved Aeronautical Replacement Parts, AC 20-62 (PDF)
Voluntary Disclosure reporting Program, AC 00-58 (PDF)