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150/5345-42H AAS-100 Specification for Airport Light Bases, Transformer Housings, Junction Boxes, and Accessories

This advisory circular contains the specifications for airport light bases, transformer housings, junction boxes, accessories, elevated light fixture covers and stakes.  It is not intended to be a compilation of currently available product designs.  Instead, it provides the basic standard requirements for critical dimensions and performance requirements to which all manufacturers must demonstrate compliance. 

20-184 AIR-133 Guidance on Testing and Installation of Rechargeable Lithium Battery and Battery Systems on Aircraft

The guidance in this AC is intended for manufacturers, installers, maintenance personnel, and users of installed rechargeable lithium batteries and battery systems on aircraft. As with all advisory material, this AC is not mandatory and does not constitute a regulation. It is issued for guidance purposes and to outline a means of compliance with applicable airworthiness requirements.

This advisory circular (AC) provides manufacturers and installers with an acceptable means of compliance to meet the installation, operation, maintenance and airworthiness requirements for installation of lithium batteries on aircraft (14 CFR part 21, 23, 25, 27 and 29).

150/5200-28E AAS-300 Notices to Airmen (NOTAMs) for Airport Operators

This AC provides guidance on using the Notice to Airmen (NOTAM) system for reporting airport facilities changes or outages and for airport condition reporting. It explains procedures used to describe, format, and disseminate information on unanticipated or temporary changes to components of, or hazards in, the National Airspace System (NAS). 

150/5345-44K AAS-100 Specification for Runway and Taxiway Signs

This AC contains the FAA specifications for unlighted and lighted signs to be used on taxiways and runways. 

91-74B AFS-800 Pilot Guide: Flight In Icing Conditions

This advisory circular (AC) contains updated and additional information for the pilots of airplanes under Title 14 of the Code of Federal Regulations (14 CFR) parts 91, 121, 125, and 135. The purpose of this AC is to provide pilots with a convenient reference guide on the principal factors related to flight in icing conditions and the location of additional information in related publications. As a result of these updates and consolidating of information, AC 91-74A, Pilot Guide: Flight in Icing Conditions, dated December 31, 2007, and AC 91-51A, Effect of Icing on Aircraft Control and Airplane Deice and Anti-Ice Systems, dated July 19, 1996, are cancelled. This AC does not authorize deviations from established company procedures or regulatory requirements.

21-43A AIR-110 Production Under 14 CFR Part 21,Subparts F, G, K, and O

This advisory circular (AC) provides information for production approval holders (PAH) pursuant to Title 14 of the Code of Federal Regulations (14 CFR) part 21, Certification Procedures for Products and Articles. This AC provides PAHs and applicants for a production approval with guidance for developing and maintaining a production system that is appropriate to the PAH’s operations and complies with the regulations.

21-44A AIR-100 Issuance of Export Airworthness Approvals Under 14 CFR Part 21 Subpart L

This advisory circular (AC) provides guidance on how to show compliance with Title 14 of the Code of Federal regulations (14 CFR) part 21, 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 this AC, you must follow it in all important respects.

45-2E AIR-100 Identification and Registration Marking

This advisory circular (AC) provides information about Title 14, Code of Federal Regulations (14 CFR), part 45, Identification and Registration Marking. 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 the requirements for identifying aircraft and aircraft engines with identification plates, identification marking requirements for propellers, and marking aircraft with nationality and registration marks. However, if you use the means described in the AC, you must follow it in all important respects.

A list of other related sections of 14 CFR and related publications, and definitions pertinent to this AC are located in the appendixes to this AC.

119-1 AFS-300 Airworthiness and Operational Approval of Aircraft Network Security Program (ANSP)

This advisory circular (AC) describes an acceptable means, but not the only means, of obtaining operational authorization for an aircraft certified with a special condition (SC) related to security of the onboard computer network. This AC is not mandatory and does not constitute a regulation. However, if you use the means described in the AC, you must conform to it in totality.

150/5300-18C AAS-100 Survey and Data Standards for Submission of Aeronautical Data Using Airports GIS

This AC provides the specifications and technical requirements for data collection conducted at airports in support of the FAA Airport Surveying – Geographic Information System (GIS) Program. The information furnished under these standards covers the entire spectrum of the FAA’s airport data requirements, including runway and stopway data, navigational aid data, obstruction data, and data on various airport features, including taxiways, aprons, and landmark features. 

This version of the AC is a major rewrite; it now conforms to the new FAA enterprise data model and process of maintaining a single authoritative source of aeronautical data. 

150/5300-19 AAS-100 Airport Data and Information Program

Note: The FAA is moving toward an electronic data submission system with the implementation of the FAA’s Navigation Procedures Project (NAV Lean) solution.  Sections of this AC may be used as those portions of the system become available.  In the interim, please refer to the current guidance provided in AC 150/5200-35A, Submitting the Airport Master Record in Order to Activate a New Airport for paper-based data submissions.

This AC provides general guidance and information for airport owners and operators in the collection and management of data describing the physical infrastructure, characteristics, and services of their airport. This data is source material for the FAA’s aeronautical information databases, for use in the dissemination of aviation information to the public, preparation of government and private industry aeronautical charts, and related flight information publications. This AC also describes the schedule, frequency, and standards for airport inspections.  

120-87C AFS-200 Use of Child Restraint Systems on Aircraft

This advisory circular (AC) provides information and practices regarding the use of child restraint systems (CRS) on aircraft. The Federal Aviation Administration (FAA) intends for operators to use this as a resource during the development, implementation, and revision of an air carrier’s standard operating procedures (SOP), Web sites and training programs regarding the use of CRSs.

 FAA Initiatives. This AC is one of several FAA initiatives designed to address safety concerns of the National Transportation Safety Board (NTSB). It is a part of the FAA’s ongoing commitment to educate and inform aircraft operators, crewmembers, and airline passengers regarding the use of CRSs on aircraft in order to encourage and increase the use of approved CRSs. For more information, refer to the following FAA Web site: http://www.faa.gov/passengers/fly_children/.


Regulatory Requirements. In addition, this AC provides information to air carriers conducting Title 14 of the Code of Federal Regulations (14 CFR) part 121 operations about the requirement to make available on their Web sites the width of the narrowest and widest passenger seats in each class of service for each make, model, and series (M/M/S) of airplane used in passenger-carrying operations. If an air carrier does not have a Web site, the air carrier is not required to establish a Web site in order to comply with this regulation.


187-1J AFS-50 Flight Standards Service Schedule of Charges Outside the United States

This advisory circular (AC) transmits an updated schedule of charges forservices of Federal Aviation Administration (FAA) Flight Standards Service (AFS) aviation safety inspectors (ASI) outside the United States. Rulemaking action to Title 14 of the Code of Federal Regulations (14 CFR) part 187, Docket No. 27809 and Notice 94-24, Fees for Certification Services and Approvals Performed Outside the United States, established the methodology for determining these charges. The rulemaking established that the FAA would publish these fees in an AC.

150/5370-12B AAS-100 Quality Management for Federally Funded Airport Construction Projects

This advisory circular (AC) provides information on the planning and oversight of construction projects at airports accomplished under the FAA's Airport Improvement Program (AIP). In addition to the previous version, this AC cancels:

  • AC 150/5300-9B, Predesign, Prebid, and Preconstruction Conferences for Airport Grant Projects
  • AC 150/5370-6D, Construction Progress and Inspection Report-Airport Improvement Program (AIP)

91-57A AJV-115 Model Aircraft Operating Standards

This advisory circular (AC) provides guidance to persons operating UnmannedAircraft (UA) for hobby or recreation purposes meeting the statutory definition of "model aircraft" contained in Section 336 of Public Law 112-95, the FAA Modernization and Reform Act of 2012. This AC describes means by which model aircraft may be operated safely in the National Airspace System (NAS). Nothing in this AC changes the requirement to comply with the statute or any applicable regulations.

150/5210-20A AAS-300 Ground Vehicle Operations to include Taxiing or Towing an Aircraft on Airports

This AC and its appendices provide guidance to airport operators about developing training programs for safe ground vehicle operations, personnel taxiing or towing an aircraft, and pedestrian control on the movement and safety areas of an airport.

This version represents a major rewrite. The AC now addresses aircraft being taxied by persons other than certificated pilots; adds a definition for Airport Operations Area; revises the definition for Non-Movement Area; replaces the term “Ramp” with “Apron” to harmonize with the International Civil Aviation Organization (ICAO) Annex 14 Volume 1; adds a definition for Vehicle or Pedestrian Deviation; provides guidance for towered airports on Part 139 requirements for people and equipment in the Runway Safety Area (RSA); calls for a Letter of Agreement at towered airports between the airport operator, the tower, and FAA Technical Operations; provides guidance on taxing and/or towing aircraft in the movement area by non-pilots; and incorporates numerous changes to format and content throughout the document. 

00-66 AIR-130 Selection of Cyclic Redundancy Code and Checksum Algorithms to Ensure Critical Data Integrity

This advisory circular (AC) provides information about the availability of resource material on digital data integrity. This information is in the form of a research report entitled "Selection of Cyclic Redundancy Code and Checksum Algorithms to Ensure Critical Data Integrity," DOT/FAA/TC-14/49, dated March 2015. This report is provided for information only and, as such, is not intended as guidance but rather as reference material for the aviation industry. 



61-83H AFS-800 Nationally Scheduled, FAA Approved, Industry Conducted Flight Instructor Refresher Course

This advisory circular (AC) provides information and standards for the preparation and approval of training course outlines (TCO) for Federal Aviation Administration (FAA)-approved, industry-conducted flight instructor refresher courses (FIRC) in accordance with Title 14 of the Code of Federal Regulations (14 CFR) part 61, § 61.197(a)(2)(iii). The intent of the FIRC program is to keep flight instructors informed of the changing world of General Aviation (GA) flight training and to enhance aviation safety through continued refresher training of the flight instructor cadre. Attending a FIRC is one of several methods by which a flight instructor may renew his or her flight instructor certificate. This AC provides one acceptable method by which the FAA may approve a FIRC program.

120-70C AFS-400 Operational Authorization Process for Use of Data Link Communication System

This advisory circular (AC) applies to all operators conducting data link operations and presents various methods for all air operators using data link systems to meet Federal Aviation Administration (FAA) and International Civil Aviation Organization (ICAO) Standards, to include as well-recommended practices. The AC introduces U.S. domestic Controller-Pilot Data Link Communication Departure Clearances (CPDLC-DCL) and the European LINK 2000+ CPDLC program. This revision also incorporates an expanded description of event reporting and defines the roles and responsibilities during the authorization process. It provides operational approval information for operators conducting operations under Title 14 of the Code of Federal Regulations (14 CFR) parts 91, 91 subpart K (part 91K), 121, 125, 129, 133, and 135. For complete airworthiness guidance for new aircraft and systems, refer to the current edition of AC 20-140, Guidelines for Design Approval of Aircraft Data Communications Systems Supporting Air Traffic Services (ATS). Authorizations to conduct data link operations approved under previous versions of AC 120-70 do not require further evaluation.

120-112 AFS-200 Use of Liquid Water Equivalent System to Determine Holdover Times or Check Times for Anti-Icing Fluids

This advisory circular (AC) provides guidance for the Federal Aviation Administration’s (FAA) standard for a Liquid Water Equivalent System (LWES). This AC applies to anyone proposing to design, procure, construct, install, activate, or maintain an LWES. An LWES is an automated weather measurement system that determines the Liquid Water Equivalent (LWE) rate in conditions of frozen or freezing precipitation. The LWE rate is used by the system with the appropriate endurance time (ET) regression equations and regression coefficients specified in an FAA-approved current database at to determine the holdover time (HOT) or check time (CT) for an aircraft’s applied anti-icing fluid (Society of Automotive Engineer (SAE) Types I, II, III, and IV). Thus, the LWES incorporates a Holdover Time Determination System (HOTDS) or Check Time Determination System (CTDS). The HOT is used to determine how long a fluid would provide protection assuming that the current conditions do not change. The CT is used to determine the fluid’s current protection capability, while incorporating varying weather conditions.

90-109A AFS-800 Transition to Unfamiliar Aircraft

This advisory circular (AC) is intended to help plan the transition to any unfamiliar fixed-wing airplanes, including type-certificated (TC) and/or experimental airplanes. It provides information and guidance to owners and pilots of experimental, simple, complex, high-performance, and/or unfamiliar airplanes. It also provides information to flight instructors who teach in these airplanes. This information and guidance contains recommendations for training experience for pilots of experimental airplanes in a variety of groupings based on performance and handling characteristics. This AC does not address the testing of newly built experimental airplanes. The current edition of AC 90-89, Amateur-Built Aircraft and Ultralight Flight Testing Handbook, provides information on such testing. However, if a pilot is planning to participate in a flight test program in an unfamiliar and/or experimental airplane, this AC should be used to develop the skills and knowledge necessary to safely accomplish the test program utilizing the guidance found in AC 90-89.

120-85A AFS-300 Air Cargo Operations

This advisory circular (AC) provides operators with recommended procedures for managing cargo operations. Developing and using these comprehensive procedures is key to establishing a safe and efficient cargo operation. The AC provides guidance for aircraft cargo loading systems (CLS), restraints, special cargo, and unit load devices (ULD)This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, of complying with applicable regulations to manage cargo operations.

  • The terms must and will are used in this AC to reflect regulatory requirements.
  • When this AC uses suggestive and permissive language (e.g., should and may), it is used to describe recommended or acceptable means, but not the only means, to comply with this AC.
150/5210-17C AAS-300 Programs for Training of Aircraft Rescue and Firefighting Personnel

This AC provides information on courses and reference materials for training of Aircraft Rescue and Firefighting (ARFF) personnel. This revision replaces Appendix 1  with an Addendum of Aircraft Rescue and Firefighting (ARFF) Training Facilities, which the FAA will update on a quarterly basis. It also  removes the one minute time requirement for donning of Personal Protective Equipment and the Self-Contained Breathing Apparatus.

147-3B AFS-300 Certification and Operation of Aviation Maintenance Technician Schools

This advisory circular (AC) provides guidance to assist persons in obtaining and maintaining Federal Aviation Administration (FAA) certification of an Aviation Maintenance Technician School (AMTS). This AC is not mandatory and does not constitute a regulation. This AC describes acceptable means, but not the only means, to meet the requirements of Title 14 of the Code of Federal Regulations (14 CFR). However, if you choose to follow this AC as the means to meet the provisions of 14 CFR part 147, then you must follow the AC in its entirety. New content in AC 147-3B will provide part 147 AMTS applicants and currently certificated AMTSs with information concerning comprehensive detail of AMTS operations to include Distance Learning and Operations Specifications (OpSpec) informational guidance for industry.

00-56B AFS-300 Voluntary Industry Distributor Accreditation Program


This advisory circular (AC) describes a system for accrediting civil aircraft parts distributors based on voluntary industry oversight. The AC also provides information for developing accreditation programs. We, the Federal Aviation Administration (FAA), strongly endorse participation in such a program to help certificated persons establish the eligibility of parts and products for installation on U.S. type-certificated (TC) products. We have revised this AC to meet current changes in regulatory requirements and industry practices since original publication. This AC is not mandatory and does not constitute a regulation. Any mandatory language used in this AC applies only to those who choose to voluntarily participate in this program; those who do choose to participate must follow the processes and procedures described in this AC in their entirety to be considered compliant with this program.


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