# Proposed AD FAA-2025-5404: Gulfstream Aerospace LP Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-09-04
- Products: Gulfstream Aerospace LP
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: January 7, 2026, 91 FR 457
- Comments due: February 23, 2026
- Became: [AD 2026-09-04](https://openairdocs.org/ad/2026-09-04)
- Docket: FAA-2025-5404 (https://www.regulations.gov/docket/FAA-2025-5404, where comments are filed)
- Project: MCAI-2025-00424-T
- FR document: 2026-00119
- Official PDF: https://openairdocs.org/files/sha256/de/78/de7849b42912838e3808df3222ab2340c7c70df934ed2c2aa96ac625cd3574bd (from https://www.govinfo.gov/content/pkg/FR-2026-01-07/pdf/2026-00119.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/01/07/2026-00119/airworthiness-directives-gulfstream-aerospace-lp-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-00119-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-5404

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Gulfstream Aerospace LP (GALP) Model Gulfstream G280 airplanes. This proposed AD was prompted by reports of the accumulation of water in electrical connectors located in the aft fuselage directly below the empennage, resulting in empennage flight control related crew alerting system (CAS) messages. This proposed AD would require retrofitting the flight controls empennage electrical harness. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jan 7, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-00119, comments due Feb 23, 2026 (https://www.federalregister.gov/documents/2026/01/07/2026-00119/airworthiness-directives-gulfstream-aerospace-lp-airplanes)

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