Advisory Circulars (AC)

• 21-23, Airworthiness Certification of Civil Aircraft Engines, Propellers, and Related Products Imported into the United States
• 21-2, Complying with the Requirements of Importing Countries or Jurisdictions When Exporting U.S. Products, Articles, or Parts

Orders

• 8110.51, Acceptability of Previously Approved Certification Compliance Data from Foreign Sources
• 8110.52, Type Validation and Post-Type Validation Procedures
• 8110.4, Type Certification - All Changes Available

Guidance

• One Only Supplemental Type Certificates Involving Foreign Registered Aircraft — policy memorandum.
• Bilateral Agreement Listing

Additional Information

• Rotorcraft
• Small Airplanes
• Transport Airplanes