# Proposed AD FAA-2025-1106: Airbus Helicopters Deutschland GmbH

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2025-20-06
- Products: Airbus Helicopters Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 18, 2025, 90 FR 25911
- Comments due: August 4, 2025
- Became: [AD 2025-20-06](https://openairdocs.org/ad/2025-20-06)
- Docket: FAA-2025-1106 (https://www.regulations.gov/docket/FAA-2025-1106, where comments are filed)
- Project: MCAI-2023-01052-R
- FR document: 2025-11213
- Official PDF: https://openairdocs.org/files/sha256/7b/b0/7bb08b33172b44994d0be13bc62d1bb3d2e4dd73245f5f54c74056784fe14ee2 (from https://www.govinfo.gov/content/pkg/FR-2025-06-18/pdf/2025-11213.pdf)
- Federal Register: https://www.federalregister.gov/documents/2025/06/18/2025-11213/airworthiness-directives-airbus-helicopters-deutschland-gmbh
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2025-11213-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2025-1106

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH Model MBB-BK 117 D-2 and MBB-BK 117 D-3 helicopters. This proposed AD was prompted by reports of airspeed and altitude indication errors. This proposed AD would require revising the existing rotorcraft flight manual supplement (RFMS) for the helicopter and replacing the air conditioning system (ACS) condenser outlet grids with ACS condenser outlet covers, and would prohibit installing ACS condenser outlet grids. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 18, 2025: Notice of proposed rulemaking (NPRM). (first notice), FR document 2025-11213, comments due Aug 4, 2025 (https://www.federalregister.gov/documents/2025/06/18/2025-11213/airworthiness-directives-airbus-helicopters-deutschland-gmbh)

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