2023-23-14: Fuel

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: 2023-23-14 The Boeing Company: Amendment 39-22616; Docket No. FAA-2023-2228; Project Identifier AD-2023-01095-T. (a) Effective Date This airworthiness directive (AD) is effective December 15, 2023. (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, 747SR, 747SP, 747-8F, and 747-8 series airplanes, certificated in any category. (d) Subject Air Transport Association (ATA) of America Code 28, Fuel. (e) Unsafe Condition This AD was prompted by reports of latent failures of the lightning protection features for the engine fuel feed system. The FAA is issuing this AD to address latent failures of the lightning protection features for the engine fuel feed system. A lightning strike to an engine nacelle combined with latent failures of the lightning protection features for the engine fuel feed system, if not addressed, could result in the potential for ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Repetitive Inspections/Measurements, Related Investigative, and Corrective Actions Within 90 days after the effective date of this AD for Model 747 airplanes operated in a passenger configuration, and within 120 days after the effective date of this AD for Model 747 airplanes operated in an all-cargo configuration: Do a detailed inspection for damage and measure the electrical bonding resistance of the out-tank fuel feed tube bonding jumper in the strut for each of the four engines, measure the electrical bonding resistance of the forward side of the front spar bulkhead fitting adapter for each of the four engines, and do all applicable related investigative and corrective actions, in accordance with Part 2 of the applicable Boeing multi operator message specified in paragraphs (g)(1) through (3) of this AD. Do all applicable related investigative and corrective actions before further flight. Repeat the inspection and measurements thereafter at intervals not to exceed 12 months. (1) For Model 747-8 and 747-8F series airplanes: Boeing Multi Operator Message MOM-MOM-23-0885-01B-R1, dated November 13, 2023. (2) For Model 747-400, 747-400D, and 747-400F series airplanes: Boeing Multi Operator Message MOM-MOM-23-0899-01B-R1, dated November 13, 2023. (3) For Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747SR, and 747SP series airplanes: Boeing Multi Operator Message MOM-MOM-23-0907-01B, dated November 13, 2023. (h) Repetitive Reporting Requirement for All Airplanes At the applicable compliance times specified in paragraphs (h)(1) and (2) of this AD: Submit a report of all findings from each work package performed as required by paragraph (g) of this AD, in accordance with Appendix C of the applicable Boeing multi operator message identified in paragraphs (g)(1) though (3) of this AD. (1) For the initial inspections and measurements required by paragraph (g) of this AD, submit the report at the applicable compliance time specified in paragraph (h)(1)(i) or (ii) of this AD. (i) For Model 747 airplanes operated in a passenger configuration: Within 120 days after the effective date of this AD. (ii) For Model 747 airplanes operated in an all-cargo configuration: Within 150 days after the effective date of this AD. (2) For each repetitive inspection and measurement required by paragraph (g) of this AD, submit the report at intervals not to exceed 30 days after completing all four work packages. (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) 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 For more information about this AD, contact Samuel Dorsey, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-231-3415; email: [email protected]. (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. (i) Boeing Multi Operator Message MOM-MOM-23-0885-01B-R1, dated November 13, 2023. (ii) Boeing Multi Operator Message MOM-MOM-23-0899-01B-R1, dated November 13, 2023. (iii) Boeing Multi Operator Message MOM-MOM-23-0907-01B, dated November 13, 2023. (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 20, 2023. Caitlin Locke, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2023-26367 Filed 11-27-23; 4:15 pm]BILLING CODE 4910-13-P