2026-03704Proposed Rule

Boeing 787s Swap Faulty Landing Cables for Safer Flights

Published Date: 2/24/2026

Proposed Rule

Summary

The FAA wants Boeing 787-8, 787-9, and 787-10 planes to swap out some radio altimeter cables because the current ones can give wrong altitude info during landing. This fix will make flying safer by improving the altimeter’s reliability. Airlines need to comment by April 10, 2026, and expect some costs and downtime to get the new cables installed.

Analyzed Economic Effects

3 provisions identified: 2 benefits, 1 costs, 0 mixed.

Estimated per-airplane and total compliance costs

The FAA estimates the replacement will affect 169 U.S.-registered Boeing 787 airplanes. Estimated cost per airplane is 28 work-hours × $85/hour = $2,380 labor plus $15,170 parts, for a total of $17,550 per airplane. The FAA estimates total cost on U.S. operators at $2,965,950.

Boeing 787s must replace LRRA cables

If you operate Boeing Model 787-8, 787-9, or 787-10 airplanes, the FAA proposes to require replacing the left and right low range radio altimeter (LRRA) transmit and receive coaxial cables with larger gauge Type 0J coaxial cables to address increased non-computed data outputs during approach and landing. The actions reference Boeing Alert Requirements Bulletin B787-81205-SB340062-00 RB, Issue 001, dated December 23, 2024, and the FAA is taking comments on the proposal through April 10, 2026.

Manufacturer warranty may reduce operator costs

The FAA notes that, according to the manufacturer, some or all of the costs to comply with this proposed AD may be covered under warranty, which could reduce the cost impact on affected operators.

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Key Dates

Published Date
Comments Due
2/24/2026
4/10/2026

Department and Agencies

Department
Independent Agency
Agency
Transportation Department
Federal Aviation Administration
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