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Airworthiness Directive

AD 2026-08-11 91 FR 21952 Active

Federal Aviation Administration · 14 CFR part 39

Requires replacement of the LH and right-hand (RH) brake pipe assemblies and also prohibits the installation of affected parts.

Federal Register (opens in a new tab)

FR document
2026-08022
Amendment
39-23319
Published
2026-04-24
Effective
2026-05-11
Models covered
1

Last live check: 2026-08-19

Printed from https://aircraftdirectives.com/ad/2026-08-11 · AircraftDirectives restates official FAA and manufacturer records; the official sources named on this sheet control. Not an airworthiness determination.

This page is a reference Record, not an airworthiness or compliance determination. Official FAA and manufacturer sources control over our restatement, subject to governing law. Check applicability, current requirements and incorporated documents before acting. The owner or operator remains responsible for airworthiness and required records under 14 CFR 91.403 and 91.417, as applicable. Terms of Use: /terms.

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AD

2026-08-11

FR doc 2026-08022 · 91 FR 21952

AD 2026-08-11Published 2026-04-24Effective 2026-05-11

FAA rule - 14 CFR 39

FAA rule. Compliance with an applicable AD is required under 14 CFR 39.7. Check its effective date, applicability, compliance times and current status.

Requires replacement of the LH and right-hand (RH) brake pipe assemblies and also prohibits the installation of affected parts.

Full official abstract

The FAA is adopting a new airworthiness directive (AD) for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-12/47G airplanes. This AD was prompted by a report that a brake shuttle valve (BSV) on a production airplane shuttled and isolated the brake line to the left- hand (LH) brake, which resulted in brake lockup. This AD requires replacement of the LH and right-hand (RH) brake pipe assemblies and also prohibits the installation of affected parts. The FAA is issuing this AD to address the unsafe condition on these products.

More directives for Pilatus PC-12

  1. AD 2026-15-12 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2026-10-02
  2. AD 2026-15-07 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2026-09-03
  3. AD 2026-12-01 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2026-07-14
  4. AD 2024-08-07 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2024-06-03
  5. AD 2023-12-17 Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Effective 2023-08-07

All Pilatus PC-12 directives

View on Federal Register (opens in a new tab) Search DRS manually for AD 2026-08-11 (opens in a new tab) Print AD packet (opens the full Federal Register document in a new tab)

Applies to 1 model in our index