Title 14 Code of Federal Regulations (14 CFR)

  • Part 21, Certification Procedures for Products, Articles, and Parts
  • Part 23, Airworthiness Standards: Normal, Utility, Acrobatic, and Commuter Category Airplanes
  • Part 34, Fuel Venting and Exhaust Emission Requirements for Turbine Engine Powered Airplanes
  • Part 36, Noise Standards: Aircraft Type and Airworthiness Certification
  • Part 43, Maintenance, Preventive Maintenance, Rebuilding, and Alteration


  • PS-ACE100-2001-006, Static Strength Substantiation of Composite Airplane Structure
  • PS-ACE100-2001-004, Guidance for Reviewing Certification Plans to Address Human Factors for Certification of Part 23 Small Airplanes

Advisory Circulars (ACs)

Industry Standards


  • Small Airplane Issues List (SAIL)
  • EASA Safety/Special Emphasis Item (SEI) List
  • EASA Significant Standard Differences (SSD): As required by the FAA-EASA Technical Implementation Procedures (TIP), the current published FAA Significant Standards Differences (SSD) pairing lists for 14 CFR part 23 pairing to the European Aviation Safety Agency (EASA) CS-23 for products coming into the USA are listed below. If an amendment pairing is not shown here for your project, the Small Airplane Standards Branch will need to evaluate and develop a new SSD list and this will make the project Non-Basic per the FAA-EASA TIP Rev 6.
  • Note 1: These amendment pairs have to be evaluated for both Basic and Non-Basic projects as required.
    Note 2: As of February 12, 2018, the above SSD list with part 23-62 does not account for the amendment 23-62 errors yet. When the FAA Equivalent Level of Safety (ELOS) for the 23-62 errors is issued, there may be a few more SSDs introduced when compared to CS 23.
    Note 3: The above SSD pairings do not include the additional EASA High Performance and General Certification Review Items (CRIs) which add additional EASA Special Conditions, Equivalent Safety Finding (ESFs), deviations, and method of compliance (MOC) that may introduce additional differences in certification requirements, which could become another set of SSDs. When these EASA additional CRIs are part of the incoming project, the Small Airplane Standards Branch will evaluate them to determine if they impact the FAA requirements and if a new set of SSDs are required.

Technical Standard Orders (TSO)

  • TSO-C22, Safety Belts
  • TSO-C39, 9g Transport Airplane Seats Certified by Static Testing
  • TSO-C114, Torso Restraint Systems
  • TSO-C127, Rotorcraft, Transport Airplane, and Normal and Utility Airplane Seating Systems