Water / Waste - Faucet Control Module - Inspections / Replacement
- Published
- Effective
- Replaces
- 2024-01-01
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must continue performing repetitive general visual inspections under lavatory washbasins for leaks and carry out on-condition actions as required. They must replace the existing FCM with the improved design by March 9, 2026, which terminates the need for repetitive inspections. Additionally, leak tests and installation of moisture management devices must be completed in accordance with the specified service bulletins and exceptions.
Summary
EASA Airworthiness Directive US-2026-02-10 is a final rule issued by the FAA addressing certain Boeing 787-8, 787-9, and 787-10 airplanes. It focuses on inspections and replacement of the faucet control module (FCM) in lavatory washbasins to prevent water leaks that could damage critical flight equipment. The directive mandates inspections, leak tests, installation of moisture management devices, and replacement of the FCM with an improved design.
What changed
This directive supersedes AD 2024-01-01 by continuing repetitive general visual inspections for leaks and adding a requirement to replace the FCM with a new design as a terminating action. It also introduces leak testing and installation of moisture management devices, along with clarifications and exceptions based on stakeholder feedback. Corrections to part numbers, station references, and procedural instructions were incorporated to improve compliance clarity.
Why it matters
This AD addresses the risk of undetected water leaks from the FCM migrating into electronic equipment bays, which could cause loss of multiple line replaceable units and jeopardize safe flight and landing. For operators and maintenance teams, compliance ensures the integrity of lavatory plumbing systems and protects critical avionics from water damage. The directive provides clear instructions to prevent operational disruptions and maintain airworthiness.
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- EASA AD US-2026-17-02Wings - Lower Outboard Wing Skin - InspectionsSep 7, 2026
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