Federal Register #2026-22817

FAA Requires LRRA Cable Replacement on Certain Boeing 787 Aircraft

The FAA issued an airworthiness directive requiring LRRA cable replacement on certain Boeing 787 aircraft; this is a safety mandate, not a procurement solicitation or contract award. - Government buyer: U.S. Department of Transportation, Federal Aviation Administration (FAA), Aircraft Certification Service. - OEM: The Boeing Company, including Boeing Commercial Airplanes. - Required modification: Replace the left and right low-range radio altimeter (LRRA) transmit and receive coaxial cables on applicable Boeing 787-8, 787-9, and 787-10 aircraft. - Replace existing BMS13-65 Type 0G cables with larger-gauge BMS13-65 Type 0J cables. - Follow Boeing Alert Requirements Bulletin B787-81205-SB340062-00 RB, Issue 001. Boeing Alert Service Bulletin B787-81205-SB340062-00, Issue 002, is also identified as an acceptable procedure in the initial release summary. - The FAA estimates 169 U.S.-registered aircraft are affected. The change addresses unreliable LRRA data and potential disruption of LRRA functions. - No cable quantity, contract value, or purchased services are specified.

Description

The FAA is adopting a final airworthiness directive for certain Boeing 787-8, 787-9, and 787-10 airplanes. Reports indicated increased non-computed data outputs from the low range radio altimeter system at low altitudes during approach and landing, which could cause unreliable altimeter function. The directive requires replacing the left and right LRRA transmit and receive coaxial cables with larger-gauge cables. The stated purpose is to address an unsafe condition that could result in loss of continued safe flight and landing.

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