2026-05-07: Wings

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: 2026-05-07 The Boeing Company: Amendment 39-23280; Docket No. FAA-2025-0618; Project Identifier AD-2024-00637-T. (a) Effective Date This airworthiness directive (AD) is effective April 16, 2026. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024. (d) Subject Air Transport Association (ATA) of America Code 57, Wings. (e) Unsafe Condition This AD was prompted by discovery of a crack at one of the underwing longeron (UWL) fitting forward fastener holes, outside of the inspection area of Boeing Alert Service Bulletin 767-57A0126, following replacement of a cracked UWL fitting. The FAA is issuing this AD to ensure that any crack in the forward lower fastener holes at the UWL fitting is found and repaired before reaching a critical length. Such cracking, if not addressed, could result in loss in the primary load path between the fuselage and the wing box, adversely affecting the structural integrity of the airplane. (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 767-57A0148 RB, dated October 10, 2024, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024. Note 1 to paragraph (g): Guidance for accomplishing the actions required by this AD can be found in Boeing Alert Service Bulletin 767-57A0148, dated October 10, 2024, which is referred to in Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024. (h) Exceptions to Requirements Bulletin Specifications (1) Where the Compliance Time column of the tables in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, refers to the original issue date of Requirements Bulletin 767-57A0148 RB, this AD requires using the effective date of this AD. (2) Where the Compliance Time column of tables 3 and 4 in the "Compliance" paragraph of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies a compliance time of within 22,000 flight cycles or 80,000 flight hours after the replacement of the underwing longeron fitting, whichever occurs first, this AD requires that the compliance time be calculated from when replacement of the underwing longeron fitting was done using Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024; or Boeing Alert Service Bulletin 767-57A0126, Revision 1, dated November 9, 2011; Revision 2, dated March 12, 2012; Revision 3, dated November 8, 2012; Revision 4, dated April 17, 2014; or Revision 5, dated April 7, 2016. (3) Where Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies contacting Boeing for repair instructions, this AD requires doing the repair using a method approved in accordance with the procedures specified in paragraph (i) of this AD. (4) During application of any cap seal to a fastener, fastener head, and fastener threads and collars inside the tank, as required by this AD, the cap seal must be applied with a thickness equal to or greater than the dimensions specified in figure 1 to paragraph (h)(4) of this AD. Figure 1 to Paragraph (h)(4)-Cap Seal Minimum Thickness (All Dimensions in Inches) ER12MR26.009 (5) Where Condition 3 (Action 2) of table 1 of the "Work Instructions" paragraph of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies to repeat the open hole high frequency eddy current (HFEC) inspection at any hole(s) using "figure 3" as the method of compliance, this AD requires, at oversize hole repair location(s), doing an open hole HFEC inspection of the fitting and the angles for any crack using "figure 35" as the method of compliance. (6) Where the "Action" column of step 5 of figures 6, 8, and 10 of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies "FITTING, UNDERWING LONGERON, LH", this AD requires replacing that text with "FITTING, UNDERWING LONGERON, RH". (7) Where step 15 of figures 15 through 28 of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies cap sealing fasteners ( i.e., applying cap seal to wing tank fasteners internally with BMS 5-45), this AD requires cap sealing all fasteners installed in accordance with steps 8 and 11 of the applicable figure in Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024. (8) Where step 11 of figures 23 through 26 of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies installing a quantity of 8 fasteners, this AD requires installing 7 fasteners. (9) Where the "Identification" column of step 9 of figures 23 through 26 of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, specifies to install BACS40R021C032F, this AD requires installing BACS40R021C037F. (10) Where the "Step" column of figure 34 of Boeing Alert Requirements Bulletin 767-57A0148 RB, dated October 10, 2024, refers to step 2, this AD requires reidentifying step 2 as an additional step 1 task. (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 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (j)(1) 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. (j) Additional Information (1) For more information about this AD, contact Stefanie Roesli, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 206-231-3964; email: Stefanie.N.Roesli@faa.gov. (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 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 767-57A0148 RB, dated October 10, 2024. (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 March 4, 2026. Lona C. Saccomando, Acting Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026-04829 Filed 3-11-26; 8:45 am]BILLING CODE 4910-13-P