Water / Waste - Potable Water System - Inspection / Modification
- Published
- Effective
- Deadline
- Replaces
- 2017-02-03
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must perform inspections and corrective actions as specified in Boeing Alert Service Bulletin 767-38A0073, Revision 3, including hose assembly removals and installations where applicable. Compliance with this AD is mandatory by February 7, 2018. Operators should also review prior AMOC approvals related to AD 2017-02-03 and ensure prohibited parts are not installed in specified locations.
Summary
Airworthiness Directive 2018-01-02 is a final rule issued by the Federal Aviation Administration affecting certain Boeing 767-200, -300, and -400ER series airplanes. This directive addresses issues with the potable water system, specifically the plastic potable water coupling and hose assemblies, to prevent malfunctions in the engine indication and crew alerting system (EICAS) during flight. It mandates inspections, corrective actions, and installations to ensure system integrity and flight safety.
What changed
This directive supersedes AD 2017-02-03 by expanding the applicability to include additional airplanes and requiring removal and installation of hose assemblies for certain models. It also clarifies part installation prohibitions and incorporates prior alternative method of compliance (AMOC) approvals. The directive allows use of BMS 5-179 tape as an alternative to the previously specified tape in service instructions.
Why it matters
This AD is critical for aviation professionals because it prevents uncontrolled water leaks from defective potable water system couplings that could wet main equipment center line replaceable units, causing electrical shorts and potential loss of essential flight functions. Operators and maintenance teams must ensure compliance to maintain aircraft safety and avoid in-flight system malfunctions. The directive also reduces the need for AMOC requests by clarifying compliance options.
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