# Proposed AD FAA-2025-0750: Airbus Helicopters Deutschland GmbH Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-18-12
- Products: Airbus Helicopters Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 9, 2025, 90 FR 19662
- Comments due: June 23, 2025
- Became: [AD 2025-18-12](https://openairdocs.org/ad/2025-18-12)
- Docket: FAA-2025-0750 (https://www.regulations.gov/docket/FAA-2025-0750, where comments are filed)
- Project: MCAI-2022-01325-R
- FR document: 2025-08075
- Official PDF: https://openairdocs.org/files/sha256/8a/69/8a6968d49d1d431f634802851822eacd7165d21330173b7df1f8583217a2637a (from https://www.govinfo.gov/content/pkg/FR-2025-05-09/pdf/2025-08075.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/05/09/2025-08075/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-08075-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-0750

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-3 helicopters. This proposed AD was prompted by reports of momentary direct current (DC) power interruption in flight of both essential busses. This proposed AD would require revising the existing rotorcraft flight manual (RFM) for your helicopter, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- May 9, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-08075, comments due Jun 23, 2025 (https://www.federalregister.gov/documents/2025/05/09/2025-08075/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters)

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