# Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
> **Rule** · Final rule. · Published 2026-06-09 · Effective 2026-07-14 · 91 FR 34752
## Document
- **Document number:** 2026-11528
- **Category:** airworthiness
- **Manufacturer:** Pilatus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 91 FR 34752
- **Publication date:** 2026-06-09
- **Effective date:** 2026-07-14
- **FAA docket:** Docket No. FAA-2026-2715
## 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/06/09/2026-11528/airworthiness-directives-pilatus-aircraft-ltd-airplanes)
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