2026-02-10: Water/waste

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: a. Removing Airworthiness Directive (AD) 2024-01-01, Amendment 39-22652 (89 FR 6422, February 1, 2024); and b. Adding the following new AD: 2026-02-10 The Boeing Company: Amendment 39-23246; Docket No. FAA-2025-1103; Project Identifier AD-2024-00141-T. (a) Effective Date This airworthiness directive (AD) is effective March 9, 2026. (b) Affected ADs This AD replaces AD 2024-01-01, Amendment 39-22652 (89 FR 6422, February 1, 2024) (AD 2024-01-01). (c) Applicability This AD applies to The Boeing Company Model 787-8, 787-9, and 787-10 airplanes, certificated in any category, having line numbers 6 through 687 inclusive, 689 through 954 inclusive, 956 through 970 inclusive, 972 through 982 inclusive, 984 through 989 inclusive, 991 through 996 inclusive, 999, 1001 through 1008 inclusive, 1012, 1013, 1016 through 1019 inclusive, 1021, 1022, 1024 through 1026 inclusive, 1029 through 1032 inclusive, 1038, 1040, 1041, 1044, 1045, 1047, 1048, 1054 through 1062 inclusive, 1071, 1072, 1074, 1075, 1082, 1085, 1087, 1091, 1094, 1095, 1098, 1099, 1103, 1109, 1112 through 1114 inclusive, 1117, 1118, 1121, 1122, 1125, 1126, 1128 through 1134 inclusive, 1136 through 1145 inclusive, 1147, 1148, 1151, 1161, and 1167. (d) Subject Air Transport Association (ATA) of America Code 38, Water/waste. (e) Unsafe Condition This AD was prompted by reports of undetected water leaks from the faucet control module (FCM) migrating below the passenger floor in multiple lavatory locations during flight, and into the electronic equipment bay(s). The FAA is issuing this AD to address undetected water leaks, which could damage flight critical equipment. The unsafe condition, if not addressed, could result in loss of multiple line replaceable units and subsequent loss of continued safe flight and landing. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Retained Inspection, With Revised Service Information This paragraph restates the requirements of paragraph (g) of AD 2024-01-01, with revised service information. Except as specified by paragraph (h) of this AD: At the applicable times specified in the "Compliance" paragraph of Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 001, dated November 1, 2022, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 001, dated November 1, 2022, or Issue 002, dated January 31, 2025. As of the effective date of this AD, only use Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 002, dated January 31, 2025, for the actions required by this paragraph. Note 1 to paragraph (g): Guidance for accomplishing the actions required by paragraph (g) of this AD can be found in Boeing Alert Service Bulletin B787-81205-SB250290-00, Issue 002, dated January 31, 2025, which is referred to in Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 002, dated January 31, 2025. (h) Retained Exception to Requirements Bulletin B787-81205-SB250290-00 RB, With No Change This paragraph restates the exception in paragraph (h) of AD 2024-01-01, with no change. Where the Compliance Time column of the table in the "Compliance" paragraph of Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 001, dated November 1, 2022, uses the phrase "the Issue 001 date of the Requirements Bulletin B787-81205-SB250290-00 RB," this AD requires using March 7, 2024 (the effective date of AD 2024-01-01). (i) New Required Actions Except as specified by paragraph (j) of this AD: At the applicable times specified in the "Compliance" paragraph of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, do all applicable actions identified in, and in accordance with, the Accomplishment Instructions of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024. Note 2 to paragraph (i): Guidance for accomplishing the actions required by paragraph (i) of this AD can be found in Boeing Alert Service Bulletin B787-81205-SB250291-00, Issue 002, dated November 22, 2024, which is referred to in Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024. (j) Exceptions to Requirements Bulletin B787-81205-SB250291-00 RB (1) Where the Boeing Recommended Compliance Time columns of the tables in the "Compliance" paragraph of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, refer to the Issue 001 date of Requirements Bulletin B787-81205-SB250291-00 RB, this AD requires using the effective date of this AD. (2) For Group 4, Configuration 3 airplanes identified in Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024: The actions in Table 1 and Table 2 of the Accomplishment Instructions in Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, are not required by this AD. (3) Where the Description column for Groups 4 and 5, Configuration 1, in table 1 of the "Effectivity" paragraph of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, refers to "Airplanes that have incorporated the P200 panel moisture management device changes in service bulletin B787-81205-SB250249-00", this AD requires replacing that text with "Airplanes that have incorporated the P200 panel moisture management device changes in service bulletin B787-81205-SB250249-00 or had the intent of service bulletin B787-81205-SB250249-00 incorporated during production". (4) Where "Task 7 Figure 1" of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, refers to stations (STAs) "1218", "1232", and "1256", this AD requires replacing that text with "1233", "1257", and "1281", respectively. (5) Where "Task 7 Figure 4," "Task 7 Figure 5", and "Task 7 Figure 6" of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, refer to STA "1218", this AD requires replacing that text with "1233". (6) Where of the Accomplishment Instructions of Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, specify to install a kept part, this AD allows installation of a new or serviceable part with the same part number as an alternative to the kept part. (7) Where the Jamco service information identified in Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024, specifies procedures for replacing FCM part number (P/N) AFUT000200A0002 with FCM P/N AFUT000200A0004, those procedures are acceptable for compliance for replacing FCM P/N AFUT000200A0001 with FCM P/N AFUT000200A0004. (k) Terminating Action for Repetitive Inspections Replacing FCM P/N AFUT000200A0001 or P/N AFUT000200A0002 with FCM P/N AFUT000200A0004 terminates the repetitive inspections required by paragraph (g) of this AD. (l) Credit for Previous Actions For Group 1, 2, 3, 5, 6, and 7 airplanes and Group 4, Configuration 1 and 2 airplanes, as identified in Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024: This paragraph provides credit for the actions required by paragraph (i) of this AD, if those actions were performed before the effective date of this AD using Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 001, dated August 30, 2023. (m) 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 (n)(1) of this AD. Information may be emailed to: [email protected]. 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. (3) AMOCs approved for AD 2024-01-01 are approved as AMOCs for the corresponding provisions of paragraph (g) of this AD. (n) Additional Information (1) For more information about this AD, contact Joshua Baek, Aviation Safety Engineer, FAA, 2200 South 216th St., Des Moines, WA 98198; phone: 562-627-6725; email: [email protected]. (2) Material identified in this AD that is not incorporated by reference is available at the address specified in paragraph (o)(5) of this AD. (o) 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. (3) The following material was approved for IBR on March 9, 2026. (i) Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 002, dated January 31, 2025. (ii) Boeing Alert Requirements Bulletin B787-81205-SB250291-00 RB, Issue 002, dated November 22, 2024. (4) The following material was approved for IBR on March 7, 2024 (89 FR 6422, February 1, 2024). (i) Boeing Alert Requirements Bulletin B787-81205-SB250290-00 RB, Issue 001, dated November 1, 2022. (ii) [Reserved] (5) For the 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. (6) 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. (7) 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 27, 2026. Peter A. White, Deputy Director, Integrated Certificate Management Division, Aircraft Certification Service. [FR Doc. 2026-02096 Filed 1-30-26; 8:45 am]BILLING CODE 4910-13-P