2026-22307·DEPARTMENT OF TRANSPORTATION

Airworthiness Directives; BRP-Rotax GmbH & Co KG (Formerly BRP-Powertrain GMBH & CO KG and Bombardier-Rotax GmbH) Engines

Final RuleFinal RuleComments open

Published: Nov 2, 2026
Effective: Nov 23, 2026
Comments close: Dec 17, 2026
Citation: 91 FR 68882
Docket: Docket No. FAA-2026-11820, Project Identifier MCAI-2026-00964-E, Amendment 39-23505
Agencies: DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration

Final rule; request for comments.

Summary

The Federal Aviation Administration (FAA) is issuing an airworthiness directive that requires owners of certain BRP‑Rotax aircraft engines to replace the turbocharger valve housing and re‑identify the turbocharger. The action is needed because cracks have been found in the housing wall, causing oil leaks that could impair engine performance and safety. The rule applies to all BRP‑Rotax Model 915 iSc2 C24, 915 iSc3 C24, 916 iSc2 A, 916 iSc2 C24, 916 iSc3 A, and 916 iSc3 C24 engines installed on U.S.‑registered aircraft. The FAA, the transportation agency responsible for aviation safety, issued the final rule on November 2, 2026. The directive becomes effective on November 23, 2026. The FAA will accept comments on the rule until December 17, 2026, after which the final compliance schedule will be confirmed and operators will be required to complete the turbocharger replacement and re‑identification as specified.

AI-generated summary — verify against the Federal Register text.

Official abstract

The FAA is adopting a new airworthiness directive (AD) for all BRP-Rotax GmbH & Co KG (BRP-Rotax) Model 915 iSc2 C24, 915 iSc3 C24, 916 iSc2 A, 916 iSc2 C24, 916 iSc3 A, and 916 iSc3 C24 engines. This AD was prompted by a report of oil leakage from cracks in the wall of the turbocharger valve housing due to insufficient thickness. This AD requires replacement of the turbocharger valve housing and reidentification of the turbocharger. The FAA is issuing this AD to address the unsafe condition on these products.