This AC describes acceptable means, but not the only means, for showing compliance with 14 CFR 25.1309, Equipment, systems, and installations. These means are intended to provide guidance to supplement the engineering and operational judgment that form the basis of any showing of compliance.

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

Included in this document are methods for fire testing of materials and components used in the propulsion engines and APU installations, and in areas adjacent to designated fire zones, as well as the rationale for these methods.

This advisory circular (AC) identifies two reports that provide information in the form of “recommended practices” to increase awareness of human factors and facilitate the identification and resolution of human factors/pilot interface issues during the design and evaluation of avionics.

This advisory circular (AC) sets forth an acceptable means, but not the only means, for demonstrating compliance with title 14, Code of Federal Regulations (14 CFR) 23.562, 23.2270, 25.562, 27.562, and 29.562, as well as technical standard order (TSO) TSO-C127, TSO-C127a, TSO-C127b, and TSO-C127c.

This advisory circular (AC) provides certification applicants with airworthiness guidance for installing passive, battery-assisted passive (BAP), and active radio frequency identification (RFID) tags and sensors on aviation products and equipment.

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.

The Federal Aviation Administration (FAA) has consolidated all synthetic vision related guidance into this advisory circular (AC).

This AC provides guidance for acceptable means, but not the only means, of demonstrating compliance with 14 CFR 25.629, and other provisions of part 25 intended to preclude the aeroelastic instabilities of flutter, divergence, and control reversal.

Moreover, conformity with this guidance document (as distinct from existing statutes and regulations) is voluntary only, and nonconformity will not affect rights and obligations under statutes and regulations.

This advisory circular (AC) provides guidance for showing compliance with the airworthiness regulations for transport category airplanes regarding lightning protection of fuel tanks and systems. These lightning protection requirements apply to normal conditions and possible failures of fuel tank structure and systems that could lead to fuel tank explosions.

Moreover, conformity with this guidance document (as distinct from existing statutes andregulations) is voluntary only, and nonconformity will not affect rights and obligations under statutes and regulations.

This advisory circular (AC) identifies SAE Aerospace Recommended Practices (ARP) 60493, Guide to Civil Aircraft electromagnetic Compatibility (EMC), dated October 25, 2017, and European Organization For Civil Aviation Equipment (EUROCAE) ED-248, Guide to Civil Aircraft Electromagnetic Compatibility (EMC), dated January 22, 2018 as recommended practices for showing compliance pursuant to the following Title 14, Code of Federal Regulations (14 CFR):

• § 23.2500
• §§ 25.1309(a), 25.1309(e), 25.1353(a), and 25.1431(c)
• §§ 27.1309(a), and Part 27 Appendix B
• §§ 29.1309(a), 29.1309(g), 29.1353(a), and 29.1431(b)

This AC includes flight test methods and procedures to show compliance with the regulations contained in title 14, Code of Federal Regulations (14 CFR) part 25, subpart B, “Flight,” which address airplane performance and handling characteristics.

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.

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.

This advisory circular (AC) provides acceptable means for showing compliance with the requirements of title 14, Code of Federal Regulations (14 CFR) 23.1301, amendment 23-62 or earlier, 25.1301, 27.1301, and 29.1301 (herein, collectively, 2X.1301), Function and installation, with regard to fire extinguishing or suppression systems that contain electrical firing cartridge components.

This advisory circular (AC) provides information and guidance on developing the technical data needed for major repairs of critical and complex turbine engine parts.

The additional guidance and clarification are provided in the form of objectives. The applicant is expected to describe the process and activities to satisfy the objectives of this AC.

Section 33.70 contains requirements applicable to the design and life management of propulsion system life-limited parts, including high-energy rotating parts.

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.

The contents of this document do not have the force and effect of law and are not meant to bind the public in any way. This document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.

This revision makes needed changes to this Advisory Circular (AC).
b. The change number and the date of the changed material are shown at the top of each page.

a.This revision makes needed changes to this Advisory Circular (AC).
b.The change number and the date of the changed material are shown at the top of each page.

This advisory circular (AC) provides guidance and describes acceptable methods, but not the only methods, that may be used to demonstrate compliance with provisions of the requirements of part 35 of Title 14 of the Code of Federal Regulations (14 CFR part 35).

Section 33.70 contains requirements applicable to the design and life management of propulsion system life-limited parts including high-energy rotating parts.

This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to obtain certification for fuel system lightning protection.