Building an Unleaded Future by 2030
Eliminate Aviation Gasoline Lead Emissions (EAGLE)
The FAA and partners in the aviation community launched the EAGLE initiative as the result of a Congressionally mandated report from the National Academies. The EAGLE team’s goal is to eliminate leaded aviation fuels in piston-engine aircraft safely by the end of 2030.
To achieve the lead-free goal, EAGLE will:
- Identify at least one unleaded fuel acceptable for safe General Aviation fleet use.
- Minimize the safety and technical impacts associated with high-performance engines using unleaded fuels.
- Facilitate the increased production, distribution and greater use of unleaded replacement fuels.
- Ensure that 100 low-lead fuel is available during the transition to unleaded fuel.
- Establish policies that support airport infrastructure funding for unleaded fuel.
- Endorse plans that reduce or eliminate reliance upon leaded aviation fuels.
How We Will Get There
- FAA has two pathways available to obtain FAA authorization for the use of a new unleaded fuel.
- FAA fleet authorization process established by Congress and in conjunction with the Piston Aviation Fuels Initiative (PAFI)
- Traditional FAA aircraft type certification / supplemental type certification (STC) process
- FAA and EAGLE have developed a chart to show various attributes of both pathways.
- Under the STC process, the FAA issued an expanded FAA approved model list STC in September 2022 to GAMI for a 100 Octane unleaded fuel (G100UL) for general aviation aircraft. FAA is also working with Swift Fuels on an STC for a limited number of engines/aircraft to operate on a high-octane unleaded fuel (100R) later this year (2023).
- The FAA issued a Fleet Authorization Policy Statement in March 2023. The Policy Statement describes the general process to obtain a fleet authorization of a qualified unleaded fuel candidate. The intent of the statement is to authorize qualified candidate unleaded fuels for safe use in applicable aircraft and engines for the U.S. piston-engine general aviation fleet. As a first step in testing and implementing the fleet authorization process and facilitating the transition to unleaded fuels, the FAA plans to issue a fleet authorization for use of the UL 94 / UL 91 unleaded fuels later this year. The FAA anticipates that approximately 68% of the general aviation fleet will be eligible to use UL 94 / UL 91 fuels.
- Under the Piston Aviation Fuels Initiative (PAFI), the FAA is working with two teams from Afton Chemical/Phillips 66 and LyondellBasell/VP Racing to test and evaluate their high-octane unleaded candidate fuel solutions The FAA expects to issue fleet authorizations for the higher-octane fuels after successful completion of PAFI full scale testing of the fuel candidates.
- To help provide guidance to flight schools, FAA and EAGLE have also developed a guidance document to help flight schools with their transition to the lead free future.
- The Airport Cooperative Research Program within the Transportation Research Board is developing a project to collect data and create best practices focused on the safe transition to unleaded fuels for the country's fleet of 220,000 piston aircraft. The project kicked-off in 2023 and will result in a guidebook for airports.
- EAGLE White Paper on the Environmental Protection Agency’s (EPA) Endangerment Finding on Lead Emissions Decision
- EAGLE Stakeholder Q&A on the Environmental Protection Agency’s (EPA) Endangerment Finding on Lead Emissions Decision
On March 16-17, 2022, the inaugural EAGLE meeting was held in Washington, D.C. This two-day EAGLE meeting was an industry-sponsored event that convened more than 120 U.S. and international stakeholders. EAGLE participants discussed:
- Organizational framework
- Details of each pillar
- Activities and associated timelines
- Commitments of time, resources, and expertise to support the four pillars
- Individual feedback on potential outcomes and actions for each pillar
Additional EAGLE stakeholder meetings and presentations will be held three times annually. Documents from these gatherings are available here:
Meeting Materials and Participant Information from EAGLE Stakeholder Meeting, March 2023
Meeting Materials and Participant Information from EAGLE Stakeholder Meeting, November 2022
Meeting Materials and Participant Information from EAGLE Stakeholder Meeting, June 2022
Meeting Materials and Participant Information from Inaugural EAGLE Meeting, March 2022
Announcement Materials, February 2022
- FAA, Industry Chart Path to Eliminate Lead Emissions from General Aviation by the end of 2030
- Industry Commitment to EAGLE,
- EAGLE Background Information and FAQs,
- an FAA letter to GA pilots
The Piston Engine Aviation Fuels Initiative (PAFI) was established in 2014 to support the evaluation of candidate-unleaded fuels to replace approved leaded gasoline. In February 2022, PAFI became an integral part of one of the four critical EAGLE pillars.
The FAA is also in close collaboration with the Environmental Protection Agency (EPA) on lead emissions associated with avgas.
- FAA Unleaded Fuel Development FAQs and Definitions
- Guidance on Transitioning a Flight School to Unleaded Avgas
- The National Academies Press, Options for Reducing Lead Emissions from Piston-Engine Aircraft
- Final report of the Unleaded AVGAS Transition Aviation Rulemaking Committee (UAT ARC) - Unleaded AVGAS Findings & Recommendations:
Legislation and Policy
- Section 565, Aviation Fuel, of the FAA Reauthorization Act of 2018 (Pub. L. 115-254)
- Office of Management and Budget (OMB) Circular No. A-119 (February 10, 1998)
- FAA Advisory Circular (AC) 20-24D, Approval of Propulsion Fuels, Additives, and Lubricating Oils
- FAA Safety Briefing article, Looking at the Future of AvGas
Media Inquiries: Contact the FAA Press Office at firstname.lastname@example.org
Contact the FAA’s Alternative Fuels Team