Skip to page content

USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

United States Department of Transportation United States Department of Transportation

Advisory Circulars (ACs)

Search Results

Number, title, description, or office

Advisory Circulars (ACs) search results
Number Title Status Office Date
450.169-1 Launch and Reentry Collision Avoidance Analysis

This AC provides guidance to launch or reentry operators on how to complete the launch and reentry collision avoidance analysis in accordance with 14 CFR § 450.169.

Active AST-1 2023-08-10
450.45-1 Launch and Reentry of Space Nuclear Systems

In accordance with § 450.45(e)(6), the FAA will evaluate the launch or reentry of any radionuclide on a case-by-case basis and issue an approval if the FAA finds that the launch or reentry is consistent with public health and safety, safety of property, and national security and foreign policy interests of the United States.

Active AST-1 2023-10-20
450.167-1 Tracking for Launch and Reentry Safety Analysis

This AC provides guidance and an acceptable means of complying with the requirement to track the flight of a launch or reentry vehicle under 14 CFR § 450.167 using onboard hardware, launch site services, or other means.

Active AST-1 2022-09-29
431.35-2A Reusable Launch and Reentry Vehicle System Safety Process

Provides guidance and information concerning the application of a systematic and logical system safety process and methodology for identification and control of public safety hazards associated with the operation of reusable launch vehicle and reentry vehicle systems.

Active AST-1 2005-07-20
450.173-1 Part 450 Mishap Plan – Reporting, Response, and Investigation Requirements

This AC includes recommendations based on lessons learned from past mishaps and insights gained from reviews of mishap plan submittals. This AC does not constitute a regulation and does not contain requirements, but is intended to assist applicants in obtaining commercial space authorizations and operating in compliance with commercial space regulations.

Active AST-1 2021-08-12
450.3-1 Definition of Launch and Scope of a Vehicle Operator License

This Advisory Circular (AC) provides guidance on the Federal Aviation Administration’s (FAA) definition of “launch” in § 401.7, and the determination of the beginning of a launch at a United States (U.S.) launch site, per § 450.3(b)(1) and (d).

Active AST-1 2022-09-29
413.13-1 Guidance on Submitting a Complete Enough and Complete Application for a Vehicle Operator License

This Advisory Circular (AC) provides guidance on demonstrating compliance with the requirements of completing a license application in accordance with Title 14 of the Code of Federal Regulations (CFR) §§ 413.11 and 413.13. This document details what constitutes a complete enough submission for application acceptance and a complete submission of an application for a license determination under 14 CFR part 450.

Active AST-1 2023-12-18
437.73-1 Anomaly Reporting and Corrective Action for a Reusable Suborbital Rocket Operating Under an Experimental Permit

Provide guidance for reporting anomalie occurring in reusable suborbital rockets operating under an expermentalpermit issued by the Federal Aviation Administration (FAA) This AC also provide guidance for implementing an anomaly reporting and corrective action system for reusable suborbital rockets operating under FAA-issued experimental permit.

Active AST-1 2007-04-20
450.31-1 Applying for FAA Determination on Policy or Payload Reviews

Sections 450.31(a)(2) and (a)(3) require an applicant to obtain a policy approval from the Administrator in accordance with § 450.41 and a favorable payload determination from the Administrator in accordance with § 450.43.

Active AST-1 2023-08-10
437.55-1 Hazard Analysis for the Launch or Reentry of a Reusable Suborbital Rocket Under an Experimental Permit

Provide guidance for applying a systematic and logical hazard analysis to the identification, analysis, and control of public safety hazards and risks associated with the launch and reentry of a reusable suborbital rocket under an experimental permit.

Active AST-1 2007-04-20
450.109-1 Flight Hazard Analysis

This advisory circular (AC) provides guidance for an operator to apply a systematic and logical hazard analysis to identify, analyze, and control public safety hazards and risks associated with flight, and phases of flight, for a launch or reentry vehicle (hereafter referred to as system) in accordance with § 450.109.

Active AST-1 2021-08-05
450.139-1 Toxic Hazards

In accordance with §§ 450.139 and 450.187, as applicable, an operator that uses toxic propellants or other toxic chemicals must conduct a toxic release hazard analysis (TRHA), manage the risk of casualties that could arise from
exposure to toxic release through toxic containment or a toxic risk assessment, and establish flight commit criteria and ground hazard controls, as applicable, for any necessary evacuation of the public from a toxic hazard area.

Active AST-1 2024-07-08
450.179-1 Ground Safety

This Advisory Circular (AC) provides guidance and a comprehensive method for performing a ground safety analysis in accordance with title 14, Code of Federal Regulations (14 CFR) §§ 450.179, 450.181, 450.183, 450.185, and 450.189.

Active AST-1 2021-09-22
450.141-1A Computing System Safety

It is intended to provide guidance for an applicant in developing software and computing system safety analyses and processes to comply with § 450.141.

Active AST-1 2021-08-16
450.115-2 Describing Flight Safety Analysis Methods

All readers should have a general understanding of flight safety analysis and of standards for scientific and engineering documentation.

Active AST-1 2024-09-20
450.101-1B High Consequence Event Protection

This AC provides an acceptable means to demonstrate compliance with § 450.101(c)(2) and § 450.101(c)(3) and provides an acceptable means of compliance with conditional expected casualties requirements in § 450.108.

Active AST-1 2024-05-03
450.123-1 Population Exposure Analysis

This Advisory Circular (AC) provides guidance and methods for performing a population exposure analysis in accordance with Title 14 of the Code of Federal Regulations (14 CFR) 450.123.

Active AST-1 2022-10-12
450.107-1 Hazard Control Strategies Determination

This AC does not constitute a regulation and does not contain requirements, but is intended to assist prospective applicants in obtaining commercial space authorizations and operating in compliance with commercial space regulations.

Active AST-1 2021-07-27
450.110-1 Physical Containment as a Hazard Control Strategy

Physical containment may be used as a hazard control strategy for launch and reentry in accordance with § 450.107(a). AC 450.107-1 Hazard Control Strategies describes how a functional hazard analysis is used to determine if physical containment is an acceptable hazard control strategy for a phase of flight.

Active AST-1 2022-09-27
450.117-1 Trajectory Analysis for Normal Flight

This advisory circular (AC) provides guidance and a comprehensive method for performing a normal trajectory analysis in accordance with § 450.117 of title 14, Code of Federal Regulations (14 CFR).

Active AST-1 2021-08-19
450.108-1 Flight Abort Rule Development

This advisory circular (AC) provides guidance and a comprehensive method to demonstrate compliance with the requirements for the flight abort hazard control strategy in § 450.108, Flight Abort.

Active AST-1 2021-07-27
450.103-1 System Safety Program

This advisory circular (AC) provides guidance and an acceptable method, but not the only method, that may be used to define an acceptable system safety program (SSP) in accordance with Title 14 of the Code of Federal Regulations (14 CFR) § 450.103 System Safety Program.

Active AST-1 2021-09-07
460.15-1 Human Factors Considerations in Commercial Human Space Flight

This advisory circular (AC) provides guidance and an acceptable method, but not the only method, that may be used to account for human factors when crew must perform safety critical roles in accordance with Title 14 of the Code of Federal Regulations (14 CFR) § 460.15.

Active AST-1 2024-08-12
450.115-1B High Fidelity Flight Safety Analysis

This Advisory Circular (AC) provides guidance and a comprehensive method for performing a high fidelity flight safety analysis in accordance with title 14 of the Code of Federal Regulations (14 CFR) § 450.115.

Active AST-1 2024-08-02