Airworthiness Directives; The Boeing Company Airplanes

Built by the Tribune's code from the Federal Register. No AI wrote this page. Published in the Federal Register Feb. 24, 2026. Document 2026-03704. Updated Nov. 14, 2026.

What it does

The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 787-8, 787-9, and 787-10 airplanes. This proposed AD was prompted by reports that the low range radio altimeter (LRRA) system has an increased rate of non-computed data (NCD) outputs at low altitudes during approach and landing, which could cause unreliable altimeter function. This proposed AD would require replacing the left and right LRRA transmit and receive coaxial cables with larger gauge coaxial cables. The FAA is proposing this AD to address the unsafe condition on these products.

The Federal Aviation Administration's summary, as published in the Federal Register.

What it would change

1 part of Title 14 of the Code of Federal Regulations:

14 CFR 39

Before this

650 earlier Federal Register documents under regulation identifier 2120-AA64 since Jan. 1, 2025.

Since then:

What happens next and when

The FAA must receive comments on this proposed AD by April 10, 2026.

The agency's dates, word for word.

Check it yourself

The record as published

Document number	2026-03704
Action	Notice of proposed rulemaking (NPRM).
Agencies	Transportation Department; Federal Aviation Administration
Published	Feb. 24, 2026
Comments close	April 10, 2026
Regulation identifier (RIN)	2120-AA64
Docket	FAA-2026-1335

Source: the Federal Register (public domain). The document in the Federal Register