Home / Agencies / DOT / 2026-11175
Final Rule

Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters

Agency
DOT
Document Number
2026-11175
Published
June 4, 2026
Effective Date
July 9, 2026

Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-3 helicopters. This AD was prompted by a report of excessive vibrations in-flight due to an incorrect installation of the angular ball bearing of the control ring assembly. This AD requires a one-time inspection of the affected swashplates and, depending on the results of the inspection, corrective actions. This AD prohibits the installation of an affected swashplate on a helicopter, unless certain requirements are met. The FAA is issuing this AD to address the unsafe condition on these products.

Federal Register Source

This document is published by the Office of the Federal Register, National Archives and Records Administration. Access the full regulatory text, preamble, and docket comments below.

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Frequently Asked Questions

What is the 2026-11175 Federal Register document?
Document 2026-11175 is a Final Rule published by the Department of Transportation in the Federal Register on June 4, 2026, with an effective date of July 9, 2026. The FAA is adopting a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-3 helicopters. This AD was prompted by a report of excessive vibrations in-flight due to an incorrect installation of the angular ball bearing of the control ring assembly. This AD requires a one-time inspection of the affected swashplates and, depending on the results of the inspection, corrective actions. This AD prohibits the installation of an affected swashplate on a helicopter, unless certain requirements are met. The FAA is issuing this AD to address the unsafe condition on these products. View the original at https://www.federalregister.gov/documents/2026/06/04/2026-11175/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters.
Is document 2026-11175 an economically significant rule?
No. Document 2026-11175 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.

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