2025-09-08: Stabilizers

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: 2025-09-08 The Boeing Company: Amendment 39-23029; Docket No. FAA-2025-0746; Project Identifier AD-2025-00674-T. (a) Effective Date This airworthiness directive (AD) is effective May 5, 2025. (b) Affected ADs None. (c) Applicability This AD applies to all The Boeing Company Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, -8, -8F, 747SR, and 747SP series airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 55, Stabilizers. (e) Unsafe Condition This AD was prompted by a report that a right-hand outboard elevator was received and installed without balance weights. The FAA is issuing this AD to address left-hand and right-hand outboard elevators delivered without balance weights. The unsafe condition, if not addressed, could result in abnormal vibration, buffeting, flutter, or oscillation that could result in loss of continued safe flight and landing. Further, outboard elevators without balance weights could result in personal injury to maintenance personnel during installation or removal of the outboard elevators. (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 paragraph 1.E., "Compliance," of Boeing Alert Safety Advisory 747-BSA-55-001, dated April 24, 2025, do all applicable actions identified as "RC" (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Alert Safety Advisory 747-BSA-55-001, dated April 24, 2025. For airplanes not identified in Boeing Alert Safety Advisory 747-BSA-55-001, dated April 24, 2025, do the actions for Group 1 airplanes specified in Boeing Alert Safety Advisory 747-BSA-55-001, dated April 24, 2025. (h) Exceptions to Safety Advisory Specifications (1) Where the "Boeing Recommended Compliance Time" columns of the tables in the "Compliance" paragraph of Boeing Alert Safety Advisory 747-BSA-55-001, dated April 24, 2025, refer to "the Original Issue date of this safety advisory," this AD requires using the effective date of this AD. (2) Where Boeing Alert Safety Advisory 747-BSA-55-001, dated April 24, 2025, specifies contacting Boeing for corrective action instructions: This AD requires doing the instructions using a method approved in accordance with the procedures specified in paragraph (j) of this AD. (i) Special Flight Permit Special flight permits may be issued in accordance with 14 CFR 21.197 and 21.199 to operate the airplane to a location where the actions required by this AD can be performed, provided the Manager, AIR-520, Continued Operational Safety Branch, FAA, concurs with issuance of the special flight permit. Send requests for concurrence by email to AMOC@faa.gov. (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 certification office, send it to the attention of the person identified in paragraph (k) of this AD. Information may be emailed to: AMOC@faa.gov. 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. (3) Except as required by paragraph (h)(2) of this AD: For material that contains steps that are labeled as Required for Compliance (RC), the provisions of paragraphs (j)(3)(i) and (ii) of this AD apply. (i) The steps labeled as RC, including substeps under an RC step and any figures identified in an RC step, must be done to comply with the AD. If a step or substep is labeled "RC Exempt," then the RC requirement is removed from that step or substep. An AMOC is required for any deviations to RC steps, including substeps and identified figures. (ii) Steps not labeled as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the RC steps, including substeps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. (k) Related Information For more information about this AD, contact Taylor Stanley, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 407-852-7677; email: taylor.stanley@faa.gov. (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 Safety Advisory 747-BSA-55-001, dated April 24, 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 fr.inspection@nara.gov. Issued on April 25, 2025. John P. Piccola, Jr., Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2025-07885 Filed 5-2-25; 8:45 am]BILLING CODE 4910-13-P