Ice and Rain Protection - Cabin Air Compressor Inlet Ice Protection System Wiring - Modification
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must comply with the AD by September 19, 2018, performing the required wiring changes and installing the new or modified inlet duct assemblies as specified in Boeing Alert Service Bulletin B787-81205-SB300019-00, Issue 002. Operators should review their inventory of spare parts to avoid installing unmodified ducts after compliance. Documentation of compliance and coordination with maintenance providers is necessary to meet the AD requirements.
Summary
The Federal Aviation Administration's Airworthiness Directive 2018-17-03 addresses certain Boeing Model 787-8 and 787-9 airplanes. This directive focuses on the cabin air compressor inlet ice protection system wiring, specifically targeting failures in the lip heater assemblies caused by wire chafing. The AD mandates modifications to electrical connectors, wire routing, and installation of new or modified inlet duct assemblies to ensure continued airworthiness.
What changed
This new airworthiness directive requires operators to change airplane electrical connectors, reroute specific wire bundles, and install updated left and right cabin air compressor inlet duct assemblies. It replaces previous service information with Boeing Alert Service Bulletin B787-81205-SB300019-00, Issue 002, dated April 20, 2018, which corrects wiring termination references. The AD clarifies that modifications to spare parts are not mandated but restricts installation of unmodified spare ducts after compliance.
Why it matters
This AD is critical for aviation professionals as it addresses potential electrical shorts and loss of essential functions caused by chafing in the ice protection system wiring. Compliance ensures the safety and reliability of the cabin air compressor inlet ice protection system, which is vital for safe flight operations. Operators, maintenance, and compliance teams must update wiring and components to prevent in-flight system failures and maintain regulatory compliance.
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