Title 14 Code of Federal Regulations (14 CFR)

• Part 21, Certification Procedures for Products, Articles, and Parts.

Advisory Circulars

• 20-41, Substitute (TSO) Aircraft Equipment
• 21-43, Production Under 14 CFR Part 21, Subparts F, G, K, and O
• 21-46, Technical Standard Order Program
• 21-50, Installation of TSOA Articles and LODA Appliances

Orders

• 8120.22, Production Approval Procedures
• 8150.1, Technical Standard Order Program