FAA’s Unleaded Avgas Transition Plan Unveiled Amidst Lingering Questions
The quest to eliminate lead from general aviation fuel has reached a complicated juncture. The Federal Aviation Administration (FAA) has formally issued its final Transition Plan to Unleaded Aviation Gasoline (Version 1.0), in compliance with the 2024 FAA Reauthorization Act. However, aviation leaders warn that the plan introduces as many queries as it resolves.
The plan, revised as of July 28, 2026, is centered on the EAGLE (Eliminate Aviation Gasoline Lead Emissions) initiative. This is a joint government-industry effort aiming for a complete nationwide phase-out of 100LL (leaded avgas) by December 31, 2030. As of the summer of 2026, approximately 222,000 spark-ignition piston-engine aircraft are registered with the FAA, with an estimated 175,000 actively flying, consuming around 180 million gallons of 100LL annually.
At EAA AirVenture Oshkosh 2026, FAA Deputy Administrator Chris Rocheleau recognized the plan’s constraints, stating that both the industry and the FAA would need to revisit Congress to clarify that full finality is not yet attainable. Adding to the uncertainty, Rocheleau subsequently announced his exit from the FAA to rejoin NBAA as its Chief Operating Officer. The FAA is presently testing three different candidate fuels at the William J. Hughes Technical Center to assess performance and compatibility.
A supplementary summary of public comments received during the January–March 2026 comment period is anticipated to be published by late 2026.
Source: General Aviation News – Unleaded Avgas Update | FAA Official Release