2024-25-09: Hydraulic power

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: 2024-25-09 The Boeing Company: Amendment 39-22911; Docket No. FAA-2024-0762; Project Identifier AD-2023-01194-T. (a) Effective Date This airworthiness directive (AD) is effective February 14, 2025. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 757-200, -200PF, -200CB, and -300 series airplanes, certificated in any category, and identified in Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023. (d) Subject Air Transport Association (ATA) of America Code 29, Hydraulic power. (e) Unsafe Condition This AD was prompted by reports of several occurrences of a power transfer unit (PTU) control valve that failed to open when commanded. The FAA is issuing this AD to address failure of the PTU control valve, which, in conjunction with a loss of the left engine or engine-driven pump (EDP) during takeoff, may result in a failure of the landing gear to retract in a timely manner. This condition, if not addressed, could add additional drag, affect climb gradient, and prevent the ability to clear obstacles on takeoff. This condition can result in loss of continued safe flight and landing. (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 757-29A0071 RB, dated November 16, 2023, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 757-29A0071, dated November 16, 2023, which is referred to in Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023. (h) Exceptions to Service Information Specifications (1) Where the Compliance Time column of the tables in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023, uses the phrase "the Original Issue date of Requirements Bulletin 757-29A0071 RB," this AD requires using the effective date of this AD. (2) Where the figures in the Accomplishment Instructions of Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023, specify certain positions on the P33 panel and disconnect bracket AD0880 or AD0881 for installing the connectors, this AD allows any open position on the P33 panel or disconnect bracket AD0880 or AD0881 for installing the connectors. (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 Katherine Venegas, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; 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 (k)(3) this AD. (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) Boeing Alert Requirements Bulletin 757-29A0071 RB, dated November 16, 2023. (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 January 6, 2025. Suzanne Masterson, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2025-00371 Filed 1-8-25; 8:45 am]BILLING CODE 4910-13-P