# Proposed AD FAA-2017-1126: Airbus Helicopters Deutschland GmbH (Previously Eurocopter Deutschland GmbH)

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-05-05
- Products: Airbus Helicopters Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 13, 2018, 83 FR 46426
- Comments due: November 13, 2018
- Became: [AD 2019-05-05](https://openairdocs.org/ad/2019-05-05)
- Docket: FAA-2017-1126 (https://www.regulations.gov/docket/FAA-2017-1126, where comments are filed)
- FR document: 2018-19737
- Official PDF: https://openairdocs.org/files/sha256/3d/9a/3d9a098da3bb3cea8ec65a08a1f5ad77d0ab3b4bcfdeb05e5b55cbe375f74a2b (from https://www.govinfo.gov/content/pkg/FR-2018-09-13/pdf/2018-19737.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/09/13/2018-19737/airworthiness-directives-airbus-helicopters-deutschland-gmbh-previously-eurocopter-deutschland-gmbh
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5548C53E940D70B48625830700724D7C.0001
- Page: https://openairdocs.org/proposed/FAA-2017-1126

## Summary

We propose to supersede Airworthiness Directive (AD) 97-26-03 for Eurocopter Deutschland GmbH Model MBB-BK 117 A-1, MBB-BK 117 A-3, MBB-BK 117 A-4, MBB-BK 117 B-1, MBB-BK 117 B-2, and MBB-BK 117 C-1 helicopters. AD 97-26-03 requires visual inspections for cracks in the ribbed area of the main rotor (M/R) mast flange (flange). Since we issued AD 97-26-03, we have determined that a certain reinforced M/R mast is not affected by the unsafe condition. This proposed AD would retain the requirements of AD 97-26-03 and would remove a certain M/R mast from the applicability. The actions of this proposed AD are intended to address an unsafe condition on these products.

## Notices in this docket

- Sep 13, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-19737, comments due Nov 13, 2018 (https://www.federalregister.gov/documents/2018/09/13/2018-19737/airworthiness-directives-airbus-helicopters-deutschland-gmbh-previously-eurocopter-deutschland-gmbh)

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