<RULE>
DEPARTMENT OF TRANSPORTATION
<SUBAGY>Federal Aviation Administration</SUBAGY>
<CFR>14 CFR Part 39</CFR>
<DEPDOC>[Docket No. FAA-2025-1103; Project Identifier AD-2024-00141-T; Amendment 39-23246; AD 2026-02-10]</DEPDOC>
<RIN>RIN 2120-AA64</RIN>
<SUBJECT>Airworthiness Directives; The Boeing Company Airplanes</SUBJECT>
<HD SOURCE="HED">AGENCY:</HD>
Federal Aviation Administration (FAA), DOT.
<HD SOURCE="HED">ACTION:</HD>
Final rule.
<SUM>
<HD SOURCE="HED">SUMMARY:</HD>
The FAA is superseding Airworthiness Directive (AD) 2024-01-01, which applied to certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. AD 2024-01-01 required repetitive general visual inspections (GVIs) of the area under all lavatory washbasins for evidence of intermittent and active leaks at the faucet control module (FCM) and applicable on-condition actions. This AD was prompted by development of an FCM with an improved design that is not susceptible to leaking. This AD continues to require the actions of AD 2024-01-01 and requires replacement of the FCM as terminating action for the repetitive GVIs, a leak test, installation of moisture management devices, and applicable on-condition actions. The FAA is issuing this AD to address the unsafe condition on these products.
</SUM>
<EFFDATE>
<HD SOURCE="HED">DATES:</HD>
This AD is effective March 9, 2026.
The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of March 9, 2026.
The Director of the Federal Register approved the incorporation by reference of a certain other publication listed in this AD as of March 7, 2024 (89 FR 6422, February 1, 2024).
</EFFDATE>
<HD SOURCE="HED">ADDRESSES:</HD>
<E T="03">AD Docket:</E>
You may examine the AD docket at
<E T="03">regulations.gov</E>
under Docket No. FAA-2025-1103; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. Th
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