# Proposed AD FAA-2025-0924: The Boeing Company Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-05-01
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 13, 2025, 90 FR 25000
- Comments due: July 28, 2025
- Became: [AD 2026-05-01](https://openairdocs.org/ad/2026-05-01)
- Docket: FAA-2025-0924 (https://www.regulations.gov/docket/FAA-2025-0924, where comments are filed)
- Project: AD-2025-00294-T
- FR document: 2025-10759
- Official PDF: https://openairdocs.org/files/sha256/39/ad/39ad03411885a8f3611fa8558d62b7173ee12fbf2286fc7f7b18c855c1410a1f (from https://www.govinfo.gov/content/pkg/FR-2025-06-13/pdf/2025-10759.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/06/13/2025-10759/airworthiness-directives-the-boeing-company-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-10759-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-0924

## 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 a report of multiple instances of loss of transponder for airplanes entering airspace in the presence of continuous wave (CW) interference, where the transponder did not meet the minimum operational performance standards (MOPS) requirement for transponder response. This proposed AD would require replacing the left and right integrated surveillance system processor unit (ISSPU) hardware. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 13, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-10759, comments due Jul 28, 2025 (https://www.federalregister.gov/documents/2025/06/13/2025-10759/airworthiness-directives-the-boeing-company-airplanes)

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