2024-24-03: Engine Exhaust

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: 2024-24-03 The Boeing Company: Amendment 39-22893; Docket No. FAA-2023-2403; Project Identifier AD-2023-00888-T. (a) Effective Date This airworthiness directive (AD) is effective January 13, 2025. (b) Affected ADs None. (c) Applicability This AD applies to The Boeing Company Model MD-11 and MD-11F airplanes, certificated in any category, equipped with General Electric (GE) CF6-80C2D1F high-bypass turbofan engines. (d) Subject Air Transport Association (ATA) of America Code 78, Engine Exhaust. (e) Unsafe Condition This AD was prompted by a report of a Model MD-11F airplane experiencing an uncommanded deployment of a thrust reverser at approximately 500 feet above ground level. The FAA is issuing this AD to address uncommanded deployment of a thrust reverser in-flight at low altitude, which could result in loss of flight control of the airplane and 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 in paragraph (h) of this AD: At the applicable times specified in paragraph 1.E., "Compliance," of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, do all applicable actions identified as "RC" (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024. (h) Exceptions to Service Bulletin Specifications (1) Where the Compliance Time columns of the tables in the "Compliance" paragraph of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, use the phrase "the original issue date of this service bulletin," this AD requires using the effective date of this AD. (2) Where Step 1, Part 10 of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, specifies doing a detailed inspection of the junction box assembly for any loose electrical connection and Step 2, Part 11 of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024, specifies applying applicable torque to any loose electrical connection, those actions are not required for compliance with this AD. (i) Reporting At the applicable time specified in paragraph (i)(1) or (2) of this AD, submit a report to The Boeing Company via the Boeing Communication System (BCS) and include the information specified in Appendixes C, D, and E of Boeing Alert Service Bulletin MD11-78A017, Revision 1, dated June 4, 2024. (1) If the inspection or test was done on or after the effective date of this AD: Submit the report within 90 days after the inspection or test. (2) If the inspection or test was done before the effective date of this AD: Submit the report within 90 days after the effective date of this AD. (j) Credit for Previous Actions This paragraph provides credit for the actions specified in paragraphs (g) and (i) of this AD, if those actions were performed before the effective date of this AD using Boeing Alert Service Bulletin MD11-78A017, dated December 4, 2023, except where step 6.c.(2)(a), "CONDITON 14 OPTION 1 (ACTION 1)," and step 6.c.(2)(b)4)d), "CONDITION 14.4 OPTION 2 (ACTION 1)," of the Accomplishment Instructions of Boeing Service Bulletin MD11-78017, dated December 4, 2023, specify to replace the junction box, that replacement must be accomplished in accordance with "PART 12: JUNCTION BOX REPLACEMENT" of the Accomplishment Instructions of Boeing Service Bulletin MD11-78017, dated December 4, 2023. (k) 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 AIR-520, Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (l)(1) of this AD. Information may be emailed to: AMOC@faa.gov . (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. (4) Except as specified by paragraph (h)(2) of this AD: For Boeing service bulletin that contains steps that are labeled as Required for Compliance (RC), the provisions of paragraphs (k)(4)(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. (l) Related Information (1) For more information about this AD, contact Tak Kobayashi, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; telephone 206-231-3553; email takahisa.kobayashi@faa.gov . (2) Material identified in this AD that is not incorporated by reference is available at the address specified in paragraph (m)(3) of this AD. (m) 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 Service Bulletin MD11-78A017, Revision 1, dated June 4, 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 November 19, 2024. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2024-28780 Filed 12-6-24; 8:45 am]BILLING CODE 4910-13-P