Airborne Software Assurance
a. This AC describes an acceptable means, but not the only means, for showing compliance with the applicable airworthiness regulations for the software aspects of airborne systems and equipment certification. This AC is not mandatory and is not a regulation. Other ACs may describe alternate means.
b. We, the Federal Aviation Administration (FAA), wrote this AC to recognize the following RTCA, Inc. documents (RTCA DO):
(1) RTCA DO-178C, Software Considerations in Airborne Systems and Equipment Certification, dated December 13, 2011.
(2) RTCA DO-330, Software Tool Qualification Considerations, dated December 13, 2011.
(3) RTCA DO-331, Model-Based Development and Verification Supplement to DO178C and DO-278A, dated December 13, 2011.
(4) RTCA DO-332, Object-Oriented Technology and Related Techniques Supplement to DO-178C and DO-278A, dated December 13, 2011.
(5) RTCA DO-333, Formal Methods Supplement to DO-178C and DO-278A, dated December 13, 2011.
Note: RTCA DO is hereafter referred to as DO.
c. References to use of DO-178C in this AC include use of supplements and DO-330 as applicable.
d. This AC also establishes guidance for transitioning to DO-178C when making modifications to software previously approved using DO-178, DO-178A, or DO-178B.
07/19/2013 AC 20-115C
e. This AC also explains the use of DO-178C for Technical Standard Order (TSO) authorizations.
f. This AC does not obligate the FAA to approve any data or perform any activities as specified within the referenced RTCA documents.
g. If you use the means in this AC as a means of compliance, you must follow it entirely.
Announcement of Availability of Airport-Related Research and Development Products
This AC explains how to obtain the latest airport-related research and development (R&D) products funded by the Federal Aviation Administration’s (FAA’s) Airports Organization, particularly the FAA’s Airport Technology Research and Development Branch, the Airport Cooperative Research Program (ACRP), the Innovative Pavement Research Foundation (IPRF), and the Airfield Asphalt Pavement Technology Program (AAPTP).
This AC provides guidance to assist operators in planning, designing, and constructing seaplane bases and associated facilities.
Design of Aircraft Deicing Facilities
This AC provides standards and recommendations for use in the design of aircraft deicing facilities.
Airport Drainage Design
This AC provides guidance for engineers, airport managers, and the public about the design and construction of airport surface storm drainage systems; and subsurface drainage systems for paved runways, taxiways, and aprons. It incorporates the DOD Unified Facilities Criteria (UFC) draft document, Surface Drainage Design, dated August 1, 2006. This revision adds guidance that was not included in the original DOD document. See paragraph 5,, "Purpose of this Revision."
Provision of Technical Assistance to Civil Aviation Authorities for Safety Oversight of International Commercial Air Transportation Including by Commercial Technical Assistance Providers
This advisory circular (AC) provides information about the provision of technical assistance to Civil Aviation Authorities (CAA) related to compliance with International Civil Aviation Organization (ICAO) standards and recommended practices. The AC explains the process the Federal Aviation Administration (FAA) uses to provide assistance to CAAs and also provides guidance CAAs can use to obtain technical assistance from commercial providers if the services of the FAA are not available.
Noncompliance with ICAO standards by CAAs is often identified under the FAA’s International Aviation Safety Assessment (IASA) program. The primary focus for the IASA program is for compliance with ICAO Annex 1, Personnel Licensing; Annex 6, Operation of Aircraft, Part 1, International Commercial Air Transport-Aeroplanes; and Annex 8, Airworthiness of Aircraft.
This AC contains information a CAA may use to identify:
Specification for L-824 Underground Electrical Cable for Airport Lighting Circuits
This AC provides specifications for L-824 underground electrical cable for airport lighting circuits.
Flight Standards Service Schedule of Charges Outside the United States
This advisory circular (AC) transmits an updated schedule of charges for services 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.
Development of a Nondestructive Inspection Program/Organization
This advisory circular (AC) provides guidance for the development of organizations and facilities performing nondestructive inspections (NDI). This material is neither mandatory nor regulatory in nature and does not constitute a regulation. It describes an acceptable means, but not the only means, for developing NDI facilities, as well as organizational and quality manuals. We, the Federal Aviation Administration (FAA), will consider other methods of demonstrating compliance that you may elect to present. We use the terms “must” and “will” in this AC only to ensure you correctly apply the recommendations of this particular method of compliance, if you choose to do so.
Installation Guidance for Domestic Flight Information Services - Broadcast
a. This advisory circular (AC) supports the use of Flight Information Services - Broadcast (FIS-B) weather and other aeronautical data link products for enhanced situation awareness of flight conditions. In this AC, the Federal Aviation Administration (FAA) recommends one way to gain airworthiness approval for the installation of FIS-B avionics equipment. We identify safety and installation requirements for continued airworthiness of aircraft FIS-B avionics equipment, systems, and applications. This AC is not mandatory and does not constitute a regulation. This AC describes an acceptable means, but not the only means, to gain airworthiness approval for your FIS-B avionics equipment. However, if you use the means described in this AC, you must follow it in its entirety.
b. FIS-B was introduced to improve safety and to increase the utility, efficiency, and capacity of the National Airspace System (NAS). Timely delivery of quality, accurate, and consistent information is utilized by pilots for assisting in operational decisions.
c. This AC was revised to remove outdated information on the Flight Information Services Data Link (FISDL) program and replace with the current FIS-B system while maintaining alternative third party subscription services.
Segmented Circle Airport Marker System
This AC provides standards for a system of airport marking consisting of certain pilot aids and traffic control devices.
Specification for Wind Cone Assemblies
This AC contains a specification for wind cone assemblies to be used to provide wind information to pilots. This revision revises the equipment qualification requirements to be furnished under the Federal grant assistance program for airports, applies photometric requirements for internally lighted wind cones to both Size 1 and Size 2 windsocks, and makes editorial changes.
Airport Signing and Graphics
This AC provides guidance on airport terminal and landside wayfinding, signing, and graphics. It focuses on four areas of the airport: roadways, parking, curbside and ground transportation, and terminal. This version is a substantial rewrite and incorporates the recommendations and guidelines developed under Airport Cooperative Research Program (ACRP) Report 52, Wayfinding and Signing Guidelines for Airport Terminals and Landside, completed in 2011.
Standards for Airport Markings
This AC contains the FAA standards for markings used on airport runways, taxiways, and aprons.
Guidance for Conduction and Use of Flight Standardization Board Evaluations
a. Evaluating Manufactured or Modified Aircraft. It provides a means but not the only means of evaluating manufactured or modified aircraft by the use of standard systems, processes, and tests necessary to determine pilot training and qualification requirements.
b. Differences in Training and Qualification between Aircraft. It describes an acceptable means, but not the only means, of compliance with applicable Title 14 of the Code of Federal Regulations (14 CFR) that provide for differences in training and qualification between aircraft with the same type certificate. It further describes an acceptable means for providing related aircraft differences training and qualification under provision of 14 CFR part 121 between aircraft with different type certificates that have been "designated" by the Administrator as related. Both of these processes use the provision of the Flight Standardization Board (FSB) report as the basis for the approval of pilot training and qualification necessary for the operation of aircraft. This AC is intended to enhance safety by:
(1) Providing a standard method of assessing applicant programs.
(2) Directly relating pilot training and qualification requirements to fleet characteristics, operating concepts, and pilot assignments.
(3) Permitting better industry planning and management by outlining what FAA requirements apply, what training resources or devices are needed, and what alternatives are possible.
(4) Encouraging aircraft manufacturers to design with the goal of developing common characteristics between related aircraft
(5) Providing a recommended framework for application of suitable credits or constraints to better address new technology and future safety enhancements.
This advisory circular (AC) provides suggestions to improve sport parachuting safety and disseminates information to assist all parties associated with sport parachuting to be conducted in compliance with Title 14 of the Code of Federal Regulations (14 CFR) part 105. It also contains information for jumpers and riggers on parachuting equipment, on-airport parachuting operations, jump pilot training, aircraft maintenance programs, parachute rigging, and procedures for Federal Aviation Administration (FAA) authorization for flight operations with a removed or modified door.
English Language Skill Standards Required by 14 CFR Parts 61,63, and 65
This advisory circular (AC) provides guidance for airman applicants, training organizations, designated examiners, and aviation safety inspectors (ASI) in determining English language skills currently required for airman certification as required by the Administrator under Title 14 of the Code of Federal Regulations (14 CFR) parts 61, 63, and 65.
Recommended Aircraft Maintenance Practices for Commercial Air Tour Operators
This AC describes maintenance practices that we, the Federal Aviation Administration (FAA), recommend for aircraft that you, a commercial air tour operator, use to perform commercial air tours. (We list these operations in Paragraph 2.) We based these practices, in part, on National Transportation Safety Board (NTSB) safety recommendations. The recommended practices in this AC aren’t mandatory and don’t constitute a regulation. However, we believe that when properly followed, these practices can increase safety in your operation and reduce the number of maintenance-related air tour accidents.
Aircraft Wake Turbulence
This advisory circular (AC) presents basic information on wake vortex behavior, alerts pilots to the hazards of aircraft wake turbulence, and recommends operational procedures to avoid wake turbulence encounters.
Public Aircraft Operations
This advisory circular (AC) provides information to assist in determining whether government or government-contracted aircraft operations conducted within the territory of the United States are public or civil aircraft operations under the statutory definition of "public aircraft," in Title 49 of the United States Code (49 U.S.C.) §§ 40102(a)(41) and 40125 (the statute). Additionally, this AC contains Federal Aviation Administration (FAA) policy pertaining to civil aircraft operators that provide contract support to government entities. The intent of this material is to better define the responsibilities of the parties to these contracts. This AC is not mandatory and does not constitute a regulation. Nothing in this AC changes the legal requirement for public aircraft operators to comply with the statute.
North American Free Trade Agreement and Specialty Air Services Operations
This advisory circular (AC) provides information and guidance for operators under the provisions of the North American Free Trade Agreement (NAFTA) and operational guidance within the three Civil Aviation Authorities (CAA). NAFTA opens up cross-border trade in Specialty Air Services (SAS) and was ratified by the United States of America, the United Mexican States, and Canada.
Training, Qualification, and Certification of Nondestructive Inspection Personnel
This advisory circular (AC) contains recommendations for the experience, training, qualification, examination, and certification of nondestructive inspection (NDI) personnel for the inspection of aircraft, engines, propellers, accessories, and other aviation components. It recommends criteria for the qualification of personnel requiring appropriate knowledge of the technical principles underlying the nondestructive tests they perform. This document applies to those individuals directly responsible for technical adequacy of the NDI methods used, as well as those persons or organizations providing training, supervision, or oversight of NDI personnel. Organizations should have a written program describing the guidelines used to train, qualify, and certify personnel. Inspection personnel qualified under this document may be eligible for Federal Aviation Administration (FAA) repairman’s certification with an NDI rating.
Chemical Oxygen Generator Security Standards
This advisory circular (AC) provides guidance for an acceptable means of showing compliance with the requirements of Title 14, Code of Federal Regulations(14 CFR) 25.795(d), Chemical oxygen generators. Section 25.795(d) requires each chemical oxygen generator (COG) or its installation to be designed so it meets one of several criteria. The means of compliance described in this document provides guidance to supplement the engineering and operational judgment that must form the basis of any compliance findings relative to a COG installed on an airplane.
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.
Airworthiness Approval of Positioning and Navigation Systems
This revision adds minor clarifications and new guidance material based on issues and questions since revision ‘C’ was published. There are several new changes such as: equipment capability versus installed limitations; clarifying database configuration versus equipment capability; adding step-down fixes to navigation databases; a new appendix for demonstrating radius to fix (RF) leg capability; and, including required navigation performance (RNP) prediction guidance for RNP authorization required approach (RNP AR APCH).