2025-02-05: 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: 2025-02-05 The Boeing Company: Amendment 39-22938; Docket No. FAA-2024-1690; Project Identifier AD-2024-00083-T. (a) Effective Date This airworthiness directive (AD) is effective March 17, 2025. (b) Affected ADs None. (c) Applicability This AD applies to all The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, and 747SR series airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 32, Landing gear. (e) Unsafe Condition This AD was prompted by a report of improper inner diameter grinding of landing gear outer cylinders, resulting in possible heat damage to the outer cylinder of the nose landing gear (NLG), body landing gear (BLG), and wing landing gear (WLG). The FAA is issuing this AD to address heat damage to the outer cylinder of the NLG, BLG, and WLG. The unsafe condition, if not addressed, could cause failure of a principal structural element to sustain its limit load or collapse of the landing gear, which may result in loss of control of the airplane or a runway departure. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions Except as specified in paragraph (h) of this AD: At the applicable times specified in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 747-32A2535, dated January 22, 2024, which is referred to in Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024. (h) Exceptions to Requirements Bulletin Specifications (1) Where the "Boeing Recommended Compliance Time" column in the table under the "Compliance" paragraph of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, refers to "the Original Issue date of Requirements Bulletin 747-32A2535 RB," this AD requires using the effective date of this AD. (2) Where Appendix B of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, specifies two-digit serial numbers, add two leading zeros ( e.g., serial number 47 should be 0047). (3) Where Appendix B of Boeing Alert Requirements Bulletin 747-32A2535 RB, dated January 22, 2024, specifies three-digit serial numbers, add one leading zero ( e.g., serial number 109 should be 0109). (i) 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 certification office, send it to the attention of the person identified in paragraph (j)(1) of this AD. Information may be emailed to: [email protected]. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the responsible Flight Standards Office. (3) 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. (j) Related Information (1) For more information about this AD, contact Stefanie Roesli, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; telephone 206-231-3964; email [email protected]. (2) Material identified in this AD that is not incorporated by reference is available at the address specified in paragraph (k)(3) of this AD. (k) 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 747-32A2535 RB, dated January 22, 2024. (ii) [Reserved] (3) For The Boeing Company material identified in this AD, contact Boeing Commercial Airplanes, Attention: Contractual & Data Services (C&DS), 2600 Westminster Boulevard, 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 Street, 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 protected]. Issued on January 16, 2025. Suzanne Masterson, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2025-02398 Filed 2-7-25; 8:45 am]BILLING CODE 4910-13-P