2026-22496·DEPARTMENT OF TRANSPORTATION

Airworthiness Directives; Pilatus Aircraft Ltd

Proposed RuleComment Period OpenComments open

Published: Nov 4, 2026
Comments close: Dec 21, 2026
Citation: 91 FR 69506
Docket: Docket No. FAA-2026-13798, Project Identifier MCAI-2026-00797-A
Agencies: DEPARTMENT OF TRANSPORTATION, Federal Aviation Administration

Notice of proposed rulemaking (NPRM).

Summary

The Federal Aviation Administration (FAA) is proposing a new safety rule that would replace an earlier directive for Pilatus PC‑24 business jets. The new rule requires owners to install a recently developed software update and to add the accompanying revised operating instructions to the airplane’s flight manual. These changes are intended to correct a known safety issue that was only temporarily addressed by a previous manual amendment. The rule is being issued by the FAA, the aviation‑safety branch of the U.S. Department of Transportation, and it applies to every Pilatus PC‑24 aircraft currently in service in the United States. Operators, maintenance providers, and aircraft owners will need to follow the updated software installation and manual revision once the rule is finalized. The proposal was published on November 4, 2026, and the FAA is accepting public comments until December 21, 2026. After the comment period, the agency will review the feedback, issue a final rule, and set a compliance deadline for installing the software and updating the manuals. Operators should monitor the FAA’s announcements to prepare for the upcoming requirements.

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

Official abstract

The FAA proposes to supersede Airworthiness Directive (AD) 2025-20-02, which applies to all Pilatus Aircraft Ltd. (Pilatus) Model PC-24 airplanes. AD 2025-20-02 requires incorporating a temporary revision into the existing airplane flight manual (AFM) for the affected airplanes, which revises the Abnormal Procedures Section. That action was considered an interim action. Since the FAA issued AD 2025- 20-02, updated software has been developed and instructions have been issued for installing the software. In addition, revised operational instructions have been issued that are applicable after installation of the updated software. This proposed AD would require installing the updated software and incorporating the applicable revised operational instructions into the AFM. The FAA is proposing this AD to address the unsafe condition on these products.