# Proposed AD FAA-2026-4636: Diamond Aircraft Industries Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2026-15-18
- Products: Diamond Aircraft Industries
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 15, 2026, 91 FR 27871
- Comments due: June 29, 2026
- Became: [AD 2026-15-18](https://openairdocs.org/ad/2026-15-18)
- Docket: FAA-2026-4636 (https://www.regulations.gov/docket/FAA-2026-4636, where comments are filed)
- Project: MCAI-2026-00070-A
- FR document: 2026-09772
- Official PDF: https://openairdocs.org/files/sha256/e3/a7/e3a733daa181a936355c8e5d939d70cfb8b499f38edd8e3d94cc057e772eebd8 (from https://www.govinfo.gov/content/pkg/FR-2026-05-15/pdf/2026-09772.pdf)
- Federal Register: https://www.federalregister.gov/documents/2026/05/15/2026-09772/airworthiness-directives-diamond-aircraft-industries-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2026-09772-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2026-4636

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Diamond Aircraft Industries Inc. (DAI) Model DA20-C1 airplanes. This proposed AD was prompted by a report of a certain emergency locator transmitter (ELT) not activating due to a missing jumper wire. This proposed AD would require a continuity inspection of the D-sub connector of the Artex ELT 1000 and, if necessary, corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 15, 2026: Notice of proposed rulemaking (NPRM). (first notice), FR document 2026-09772, comments due Jun 29, 2026 (https://www.federalregister.gov/documents/2026/05/15/2026-09772/airworthiness-directives-diamond-aircraft-industries-inc-airplanes)

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