2025-24-02: Landing gear

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: 2025-24-02 The Boeing Company: Amendment 39-23197; Docket No. FAA-2025-5025; Project Identifier AD-2025-01595-T. (a) Effective Date This airworthiness directive (AD) is effective December 10, 2025. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 737-700, -800, -900, and -900ER series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025. (d) Subject Air Transport Association (ATA) of America Code 32, Landing gear. (e) Unsafe Condition This AD was prompted by a report of a runway excursion caused by loss of braking. An inspection found that the right main landing gear (MLG) hydraulic hoses for the brakes were incorrectly installed (crossed) at the flow limiters, and the left MLG wheel speed transducer wires were also interchanged. The FAA is issuing this AD to address incorrectly installed brake hydraulic hoses for the MLG and wheel speed transducer wires for the MLG, which could cause incorrect antiskid system operation. The unsafe condition could result in loss of braking and a runway excursion with serious or fatal injuries. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Except as specified by paragraph (h) of this AD: At the applicable times specified in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 737-32A1599, dated October 14, 2025, which is referred to in Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025. (h) Exception to Requirements Bulletin Specifications Where the "Effectivity" paragraph and Compliance Time columns of the tables in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025, refer to the original issue date of Requirements Bulletin 737-32A1599 RB, this AD requires using the effective date of this AD. (i) Reporting For airplanes identified as Group 1, Configuration 3 through 5, in Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025, on which any of the findings specified in paragraphs (i)(4) through (6) of this AD were found during any inspection or test required by paragraph (g) of this AD: Submit a report within 30 days after the inspection or test, or within 30 days after the effective date of this AD, whichever occurs later. The report must include the items specified in paragraphs (i)(1) through (6) of this AD. Submit the report to Boeing Service Engineering by sending a service request using the Boeing Communication System (BCS). (1) Airplane line number. (2) Date of most recent accomplishment of any service bulletin listed in Appendix A of Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025. (3) The number of flight cycles between the most recent accomplishment of any service bulletin listed in Appendix A of Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025, and the date that the inspection or test was completed. (4) All crossed brake hydraulic hoses found during the general visual inspection for crossed brake hydraulic hoses. (5) Operational test failures of the antiskid valve operational tests. (6) Operational test failures of the transducer operational tests. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR-520, Continued Operational Safety 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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k)(1) of this AD. Information may be emailed to: [email protected]. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (2) An AMOC that provides an acceptable level of safety may be used for any repair, modification, or alteration required by this AD if it is approved by The Boeing Company Organization Designation Authorization (ODA) that has been authorized by the Manager, AIR-520, Continued Operational Safety Branch, FAA, to make those findings. To be approved, the repair method, modification deviation, or alteration deviation must meet the certification basis of the airplane, and the approval must specifically refer to this AD. (k) Additional Information (1) For more information about this AD, contact Katherine Venegas, Aviation Safety Engineer, FAA, 3960 Paramount Boulevard, Lakewood, CA 90712; phone: 562-627-5353; email: [email protected]. (2) Material identified in this AD that is not incorporated by reference is available at the address specified in paragraph (l)(3) of this AD. (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference 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) Boeing Alert Requirements Bulletin 737-32A1599 RB, dated October 14, 2025. (ii) [Reserved] (3) For Boeing material identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600; telephone 562-797-1717; website myboeingfleet.com. (4) You may view this material at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 206-231-3195. (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 [email protected]. Issued on November 19, 2025. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2025-20951 Filed 11-21-25; 11:15 am]BILLING CODE 4910-13-P