2026-08-06: Oxygen

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: 2026-08-06 The Boeing Company: Amendment 39-23314; Docket No. FAA-2026-3486; Project Identifier MCAI-2026-00002-T. (a) Effective Date This airworthiness directive (AD) is effective May 7, 2026. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 747-400 series airplanes, certificated in any category, that have been converted to a freighter configuration in accordance with Supplemental Type Certificate (STC) ST01676SE or converted to special freighter configuration in accordance with STC ST01706SE. (d) Subject Air Transport Association (ATA) of America Code 35, Oxygen. (e) Unsafe Condition This AD was prompted by a report of a ruptured crew oxygen bottle flexible hose and arcing damage on an adjacent cargo loading system (CLS) wiring harness near station (STA) 680. The FAA is issuing this AD to address chafing, arcing damage, and insufficient clearance between the crew oxygen bottle flexible hoses and adjacent wire harnesses. The unsafe condition, if not addressed, could result in fire and loss of crew oxygen supply. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Required Actions (1) Before further flight after the effective date of this AD, do a detailed inspection for chafing and arcing damage of the crew oxygen bottle flexible hoses and the adjacent wire harnesses, and for minimum clearance between the crew oxygen bottle flexible hose and the adjacent wire harnesses, in accordance with the Accomplishment Instructions of Israel Aerospace Industries Ltd. Service Bulletin 366-35-157, dated January 2026. (2) If, during any inspection required by paragraph (g)(1) of this AD, any chafing or arcing damage is found, or the clearance is less than 2 inches, before further flight, repair using a method approved by the Manager, International Validation Branch, FAA; or the Civil Aviation Authority of Israel (CAAI); or the CAAI's authorized Designee. If approved by the CAAI Designee, the approval must include the Designee's authorized signature. (h) No Reporting Requirement Although Israel Aerospace Industries Ltd., Service Bulletin 366-35-157, dated January 2026, specifies to submit certain information to the manufacturer, this AD does not include that requirement. (i) Special Flight Permits A special flight permit may be issued in accordance with 14 CFR 21.197 and 21.199 to operate the airplane to a location where the corrective actions for insufficient clearance required by this AD can be performed, provided that there are no signs of wear or chafing on either the oxygen tubes or electrical wires or harnesses. (j) Additional AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, International Validation 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 International Validation Branch, Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) of this AD and email 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) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, International Validation Branch, FAA; or the Civil Aviation Authority of Israel (CAAI); or the CAAI's authorized Designee. If approved by the CAAI Designee, the approval must include the Designee's authorized signature. (k) Additional Information For more information about this AD, contact Narbeh Mardirosian, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 562-627-5354; email: narbeh.mardirosian@faa.gov. (l) 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 this AD specifies otherwise. (i) Israel Aerospace Industries Ltd., Service Bulletin 366-35-157, dated January 2026. (ii) [Reserved] (3) For IAI-Aviation Group material identified in this AD, contact Israel Aerospace Industries, Ltd., Ben Gurion International Airport, Israel 7010000; telephone 972-3-9353090; email: AOGBDK@iai.co.il. (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 13, 2026. Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2026-07808 Filed 4-20-26; 4:15 pm]BILLING CODE 4910-13-P