# Proposed AD FAA-2026-1335: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Comment period closed
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 24, 2026, 91 FR 8794
- Comments due: April 10, 2026
- Docket: FAA-2026-1335 (https://www.regulations.gov/docket/FAA-2026-1335, where comments are filed)
- Project: AD-2025-00825-T
- FR document: 2026-03704
- Official PDF: https://openairdocs.org/files/sha256/20/07/20071ae18e4842ea1d5a21ae81ba818de90c73bff052b7236b4b9a7536073aa9 (from https://www.govinfo.gov/content/pkg/FR-2026-02-24/pdf/2026-03704.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/02/24/2026-03704/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-03704-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-1335

## Summary

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.

## Notices in this docket

- Feb 24, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-03704, comments due Apr 10, 2026 (https://www.federalregister.gov/documents/2026/02/24/2026-03704/airworthiness-directives-the-boeing-company-airplanes)

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