Home / Agencies / DOT / 2026-11528
Final Rule

Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

Agency
DOT
Document Number
2026-11528
Published
June 9, 2026
Effective Date
July 14, 2026

Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-12/47E airplanes. This AD was prompted by a report of the stall warning protection system (SWPS) engaging when not appropriate. This AD requires updating operational software and incorporating a pilot's operating handbook (POH) temporary revision (TR). This AD also prohibits the installation of affected software. 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 2026-11528 Federal Register document?
Document 2026-11528 is a Final Rule published by the Department of Transportation in the Federal Register on June 9, 2026, with an effective date of July 14, 2026. The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-12/47E airplanes. This AD was prompted by a report of the stall warning protection system (SWPS) engaging when not appropriate. This AD requires updating operational software and incorporating a pilot's operating handbook (POH) temporary revision (TR). This AD also prohibits the installation of affected software. The FAA is issuing this AD to address the unsafe condition on these products. View the original at https://www.federalregister.gov/documents/2026/06/09/2026-11528/airworthiness-directives-pilatus-aircraft-ltd-airplanes.
Is document 2026-11528 an economically significant rule?
No. Document 2026-11528 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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