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AC 450.115-1B

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Advisory circular · High Fidelity Flight Safety Analysis

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Approved
August 2, 2024
Last reviewed
August 2, 2024
This change
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. A flight safety analysis is required for launch and reentry in accordance with § 450.113(a). AC 450.113-1, Level of Fidelity, provides guidance on when a high fidelity flight safety analysis is needed and how to determine the level of fidelity that is required. In situations when a high fidelity flight safety analysis is needed, this AC 450.115-1 provides guidance for performing that analysis in compliance with § 450.115(b). A high fidelity flight safety analysis may be required by § 450.115(b) for a particular phase or for all phases of flight. An operator’s flight safety analysis method must account for all reasonably foreseeable events and failures of safety-critical systems during nominal and non-nominal launch or reentry that could jeopardize public safety, in accordance with § 450.115(a). In accordance with §450.115(b)(1), the analysis must demonstrate that any risk to the public satisfies the safety criteria of § 450.101, including the use of mitigations, and account for all known sources of uncertainty, using a means of compliance accepted by the Federal Aviation Administration(FAA). The analysis must identify the dominant source of each type of public risk with a criterion in §§ 450.101(a) or 450.101(b) in terms of phase of flight, source of hazard (such as toxic exposure, inert, or explosive debris), and failure mode, in accordance with § 450.115(b)(2). The FAA considers this AC an accepted means of compliance for complying with the regulatory requirements of § 450.115(b). It presents one, but not the only, acceptable means of compliance with the associated regulatory requirements. This AC assists with performing a high fidelity flight safety analysis. 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. The document is intended only to provide clarity to the public regarding existing requirements under the law or agency policies.
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AC 450.115-1 · 1 version
Revision
B, B
14 CFR parts
450

Guidance, not mandatory unless a rule or AD requires it. DRS record last changed November 21, 2025.

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OMB Control Number: 2120-0746 Expiration Date: 11/30/2024 Advisory Circular Feedback Form Paperwork Reduction Act Burden Statement: A federal agency may not conduct or sponsor, and a person is not required to respond to, nor shall a person be subject to a penalty for failure to comply with a collection of information subject to the requirements of the Paperwork Reduction Act unless that collection of information displays a currently valid OMB Control Number. The OMB Control Number for this information collection is 2120-0746. Public reporting for this collection of information is estimated to be approximately 5 minutes per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. All responses to this collection of information are voluntary per FAA Order 1320.46D. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to: Information Collection Clearance Officer, 800 Independence Ave, Washington, D.C. 20590.

If you find an error in this AC, have recommendations for improving it, or have suggestions for new items/subjects to be added, you may let us know by (1) emailing this form to 9-AST- ASZ210-Directives@faa.gov, or (2) faxing it to (202) 267-5450.

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