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GAO-24-106451 1 (2024-03-14)

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             G        U.S. GOVERNMENT ACCOUNTABILITY OFFICE
441 G St. N.W.
Washington, DC  20548



March  14, 2024


The Honorable  Maria Cantwell
Chair
The Honorable  Ted Cruz
Ranking  Member
Committee  on Commerce,   Science, and Transportation
United States Senate

The Honorable  Sam  Graves
Chairman
The Honorable  Rick Larsen
Ranking  Member
Committee  on Transportation and Infrastructure
House  of Representatives



Advanced   Air Mobility: Legal Authorities and Issues to Consider for Operations

Advanced  Air Mobility (AAM) is an emerging concept of air transportation that will leverage new
types of aircraft and an array of innovative technologies, such as electrified propulsion systems.
According to proponents, AAM  could be transformational, in part, because it offers the potential
to expeditiously move people and goods while operating more quietly, with reduced aircraft
emissions, and at lower costs than traditional aircraft. In addition, industry leaders anticipate that
these aircraft will eventually be capable of autonomous flight.
As noted in our 2022 report, stakeholders said that for AAM to be successful, the federal
government-including  the Federal Aviation Administration (FAA) within the Department of
Transportation (DOT)-and   industry will need to address a variety of issues, including bringing
the first AAM aircraft into commercial use.1 AAM manufacturers are currently testing their
aircrafts, and FAA has stated that it is working to support the industry's goal of initial, piloted
commercial  operations in 2025, with more widespread operations in 2028 and beyond.
The Advanced  Air Mobility Coordination and Leadership Act, enacted in October 2022, included
a provision for GAO to conduct a study on the roles, responsibilities, and interests of federal,
tribal, state, and local governments regarding AAM.2 The act also directed us to review legal
authorities as well as provide information on actions to facilitate the growth of the AAM industry
and the integration of AAM aircraft into the national airspace. This report describes (1) the legal
authorities held by DOT relevant to the future regulation of civilian AAM operations, and actions
taken relevant to these authorities, (2) relevant legal authorities of selected tribal, state, and



1GAO, Transforming Aviation: Stakeholders Identified Issues to Address for 'Advanced Air Mobility,' GAO-22-105020
(Washington, D.C.: May 9, 2022).
2Pub. L. No. 117-203, § 3, 136 Stat. 2227, 2230 (2022).


GAO-24-106451 AAM Legal Authorities


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