2025-20-02: Navigation System

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 39.13 by adding the following new airworthiness directive: 2025-20-02 Pilatus Aircraft Ltd.: Amendment 39-23155; Docket No. FAA-2025-0917; Project Identifier MCAI-2024-00740-A. (a) Effective Date This airworthiness directive (AD) is effective December 30, 2025. (b) Affected ADs None. (c) Applicability This AD applies to Pilatus Aircraft Ltd Model PC-24 airplanes, certificated in any category. (d) Subject Joint Aircraft System Component (JASC) Code 3400, Navigation System. (e) Unsafe Condition This AD was prompted by a report of an inaccurate flight director calculation on approach. The FAA is issuing this AD to prevent heading splits that can cause errors in flight director calculations resulting in lateral offsets to the desired approach course. The unsafe condition, if not addressed, could result in an increased pilot workload, resulting in a reduction of the safety margins. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency AD 2024-0240, dated December 10, 2024 (EASA AD 2024-0240). (2) The actions required by paragraph (g)(1) of this AD may be performed by the owner/operator (pilot) holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9(a) and 91.417(a)(2)(v). The record must be maintained as required by 14 CFR 91.417, 121.380, or 135.439. (h) Exceptions to EASA AD 2024-0240 (1) Where EASA AD 2024-0240 refers to its effective date, this AD requires using the effective date of this AD. (2) Where paragraph (1) of EASA AD 2024-0240 specifies to implement the AFM-TR, this AD requires revising the Abnormal Procedures Section of the existing AFM for your airplane by inserting a copy of the AFM-TR as defined in EASA AD 2024-0240. (3) Where paragraph (1) of EASA AD 2024-0240 specifies to inform all flight crews and, thereafter, operate the [airplane] accordingly, this AD does not require those actions as those actions are already required by existing FAA regulations (see 14 CFR 91.9, 91.505, and 135.21). (4) This AD does not adopt the Remarks section of EASA AD 2024-0240. (i) Alternative Methods of Compliance (AMOCs) (1) The Manager, International Validation Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the International Validation Branch, send it to the attention of the person identified in paragraph (j) of this AD and email to: AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office/certificate holding district office. (j) Additional Information For more information about this AD, contact Doug Rudolph, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (816) 329-4059; email: doug.rudolph@faa.gov. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the material listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this material as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2024-0240, dated December 10, 2024. (ii) [Reserved] (3) For EASA material identified in this AD, contact EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; email: ADs@easa.europa.eu; website: easa.europa.eu. You may find this EASA AD on the EASA website at ad.easa.europa.eu. (4) You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For information on the availability of this material at the FAA, call (817) 222-5110. (5) You may view this material at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email fr.inspection@nara.gov. Issued on November 21, 2025. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2025-21090 Filed 11-24-25; 8:45 am]BILLING CODE 4910-13-P