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Number Office Title Date
21-23B AIR-40 Airworthiness Certification of Civil Aircraft, Engine, Propellers, and Related Products Imported to the United States
Provides information on the Federal Aviation Administration’s (FAA) objectives, regulations, and general practices for the United States of America airworthiness certification or acceptance of civil aeronautical products imported to the U.S.
11-17-2004
21-28 AIR-220 Airworthiness Certification of U.S.-Produced Aircraft and Engine Kits Assembled Outside the United States
Provides information and guidance concerning airworthiness certification requirements for aircraft or aircraft engines, assembled from kits by aircraft or aircraft engine manufacturers located in other countries.
06-20-1990
21-51 AIR-110 Applicant’s Showing of Compliance and Certifying Statement of Compliance

We, the Federal Aviation Administration (FAA), wrote this advisory circular (AC) to describe how to comply with the requirements of Title 14 of the Code of Federal Regulations (14 CFR) 21.20, 21.97 and 21.303(a)(5). 
 
This AC is not mandatory and is not a regulation.  This AC describes an acceptable means, but not the only means, to comply with the requirements 14 CFR 21.20, 21.97 and 21.303(a)(5).  However, if you use the means described in this AC, you must follow it entirely

09-27-2011
21.303-4 AIR-110 Application for Parts Manufacturer Approval Via Tests and Computations or Identicality

a.  This advisory circular (AC) updates the Federal Aviation Administration’s (FAA) guidance to applicants for parts manufacturer approval (PMA) of articles via tests and computations or identicality without a license agreement.  This AC cites regulations in Title 14, Code of Federal Regulations (14 CFR) part 21, Subpart K that became effective April 16, 2011.  In addition, this AC provides a convenient application and compliance checklist, adds a certifying statement of compliance, provides guidance for assessing an article’s impact on safety and describes how the FAA approves replacement parts for technical standard order (TSO) articles.  This AC does not apply to the articles that are listed in 14 CFR 21.9(a)(1) through (6).

b.  This AC refers to parts and components as articles per 14 CFR 21.1.  This section defines an article as a material, part, component, process or appliance.  These items may include sealants, modified standard parts, brake assemblies, etc. that are in a product’s type design.  Please note PMA is not for base materials, processes or inspection procedures.

c.  This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to comply with 14 CFR Part 21, Subpart K.  If you chose to use any of these best practices, we expect you to follow it completely.  Adherence to the guidance for each applicable facet will show that an article’s design complies with the airworthiness requirements of its eligible products.  Also consult other ACs when you need guidance on product specific requirements for showing compliance.  For example, AC 33-8 has guidance for Parts Manufacturer Approval of Turbine Engine and Auxiliary Power Unit Parts under Test and Computation.

03-21-2014
21-25A AIR-120 Approval of Modified Seats and Berths
Provides information on approvals required for modifications to TSO’d seating systems. This revision incorporates guidance regarding TSO-C127 seating systems and additional information on marking and flammability testing requirements.
06-03-1997
21-17 AIR-200 Carriage of Cargo in Restricted Category Aircraft and Other Special Purpose Operations 05-31-1982
21-29C AFS-350 Detecting and Reporting Suspected Unapproved Parts Including Changes 1 and 2

 This advisory circular (AC) provides updated information and guidance to the aviation community for detecting suspected unapproved parts (SUP) and reporting them to the Federal Aviation Administration (FAA). Appendix 1 contains FAA Form 8120-11, Suspected Unapproved Parts Reports, which serves as a standardized means of reporting.

07-22-2008
21-10A ANM-110 Flight Recorder and Cockpit Voice Recorder Underwater Locating Devices
This AC provides an acceptable means of showing compliance with the underwater locating device (ULD) requirements of the Federal Aviation Regulations for recorder ULD’s.
04-19-1983
21-40A AIR-110 Guide for Obtaining a Supplemental Type Certificate
Intended as a certification guide and checklist for obtaining a Supplemental Type Certificate (STC). Title 14 of the Code of Federal Regulations (14 CFR) and Federal Aviation Administration (FAA) Directives (orders and notices) are the final authority and take precedence over this document.
09-27-2007
21-22 AIR-120 Injury Criteria for Human Exposure to Impact
Describes a range of impact trauma which may be used to establish bases for acceptance levels or performance criteria in the evaluation of occupant survivability characteristics in civil aircraft.
06-20-1985
21-19A AIR-200 Installation of Used Aircraft Engines in New Production Aircraft 07-02-2003
21-44 AIR-200 Issuance of Export Airworthiness Approvals Under 14 CFR Part 21 Subpart L

This advisory circular (AC) provides information about Title 14, Code of Federal Regulations (14 CFR) part 21, Certification Procedures for Products, Articles, and Parts. The AC covers subpart L, Export Airworthiness Approvals. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to comply with these requirements. However, if you use the means described in the AC, you must follow it in all important respects.

10-16-2009
21-43 AIR-200 Issuance of Production Approvals Under Subparts G, K, & O

This advisory circular (AC) provides information for production approval holders (PAH) under Title 14, Code of Federal Regulations (14 CFR) part 21, Certification Procedures for Products, Articles, and Parts. This AC guides PAHs in developing and maintaining quality systems for the products and articles they produce. This guidance aids the applicant for a production approval or current PAH in developing a quality system that both meets the needs of the PAH and is compliant with the regulationsYou can find this AC at http://www.faa.gov/regulations_policies/advisory_circulars/.

10-16-2009
21.25-1 ACE-111 Issuance of Type Certificate: Restricted Category Agricultural Airplanes
Provides information and guidance for obtaining a type certificate in the restricted category under Title 14 of the Code of Federal Regulations (14 CFR) Part 21, Section 21.25, for small single-engine piston and turbo-propeller driven airplanes, which will be used for agricultural special purpose operations. It also provides an acceptable means, but not the only means, of meeting the requirements of 14 CFR part 21 for the issuance of a type certificate in the restricted category.
12-01-1997
21-18 AWS-1 Large AC] Bilateral Airworthiness Agreements
Makes available to interested persons copies of all current U.S. Bilateral Airworthiness Agreements (BAA) together with an explanation of their intent. SN 050-007- 00614-4.
08-20-1982
21-37 AIR-110 Primary Category Aircraft
Provides guidance for complying with Part 21 of Subchapter C, Chapter 1, Title 14 of the Code of Federal Regulations (CFR), which contains the certification procedures for products and parts.
06-14-1994
21-26 AIR-200 Quality Control for the Manufacture of Composite Structures (Consolidated reprint includes Change 1)

Provides information and guidance concerning and acceptable means, but not the only means, of demonstrating compliance with the requirements of FAR Part 21, Certification Procedures for Products and Parts, regarding quality control (QC) systems for the manufacture of composite structures involving fiber reinforced materials, e.g., carbon (graphite), boron, aramid (Kevlar), and glass reinforced polymeric materials. Provides guidance regarding the essential features of QC systems for composites as mentioned in AC 20-107.

06-26-1989
21-31 AIR-220 Quality Control for the Manufacture of Non-Metallic Compartment Interior Components
Provides information and guidance concerning compliance with the requirements of Federal Aviation Regulations (FAR) Part 21, Certification Procedures for Products and Parts.
11-15-1991
21-16G AIR-100 RTCA Document DO-160 versions D, E and F, “Environmental Conditions and Test Procedures for Airborne Equipment”

a. This advisory circular (AC) identifies RTCA Document No. (RTCA/DO)-160 versions D, E, F, and G, Environmental Conditions and Test Procedures for Airborne Equipment, dated July 27, 1997, December 20, 2005, December 6, 2007, and December 8, 2010, respectively, as containing acceptable environmental qualifications to show compliance with certain airworthiness requirements. The FAA strongly encourages the use of RTCA/DO-160G for new articles.

b. Appendix 1 of this AC provides a summary of the changes from RTCA/DO-160C to RTCA/DO-160D, version D to E, version E to F, and F to G. The information in the table will assist you in determining if a particular version of RTCA/DO-160 is acceptable.

06-22-2011
21-41A AIR-110 Replacing MIL-S-8879C With SAE AS8879
Provides information, clarification, and procedural guidance concerning the Inactivation of MIL-S-8879Cm Screw Threads, Controlled Radius Root with Increased Minor Diameter, as it relates to the civil aviation industry.
06-20-2003
21-34 AIR-120 Shoulder Harness-Safety Belt Installations
Provides information and guidance pertinent to an acceptable means, but not the only means, for installation of shoulder harness and safety belt restraint systems at all seat locations on all previously type-certificated aircraft.
06-04-1993
21-4B AIR-200 Special Flight Permits for Operation of Overweight Aircraft
Furnishes guidance concerning special flight permits necessary to operate an aircraft in excess of its usual maximum certificated takeoff weight.
07-30-1969
21-13 AIR-200 Standard Airworthiness Certification of Surplus Military Aircraft and Aircraft Built from Spare and Surplus Parts 04-05-1973
21-47 AIR-100 Submittal Of Data To An ACO, A DER Or An ODA For A Major Repair Or Major Alteration

This advisory circular (AC) provides guidance for creating a complete data package when data is submitted to a Federal Aviation Administration (FAA), aircraft certification office (ACO) or to FAA designees, to support a major repair or major alteration.

09-29-2010
21.17-3 AIR-110 Type Certification of Very Light Airplanes Under FAR 21.17(b)
Provides a means but not the only means for the type, production, and airworthiness certification of very light airplanes (VLA); and designates the “Joint Aviation Requirements for Very Light Aeroplanes” (JAR-VLA), issued April 25, 1990, by the Joint Aviation Authorities (FAA) of Europe as an acceptable airworthiness criteria that provides in equivalent level of safety under FAR 21.17(b) for Federal Aviation Administration (FAA) type certification of VLA as a special class of aircraft. Provides other acceptable uses of the JAR-VLA in the United States aircraft certification regulatory system.
12-21-1992
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