# Proposed AD FAA-2020-0967: Airbus Helicopters Deutschland GmbH Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-02-11
- Products: Airbus Helicopters Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 26, 2020, 85 FR 67694
- Comments due: December 10, 2020
- Became: [AD 2021-02-11](https://openairdocs.org/ad/2021-02-11)
- Docket: FAA-2020-0967 (https://www.regulations.gov/docket/FAA-2020-0967, where comments are filed)
- FR document: 2020-23446
- Official PDF: https://openairdocs.org/files/sha256/7f/69/7f699c71102c9fd00fe4d287ad417d6a33ac160b2a9044a3323bb42ebb3ba949 (from https://www.govinfo.gov/content/pkg/FR-2020-10-26/pdf/2020-23446.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/10/26/2020-23446/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E5B93D719B9837368625860D0046ADEC.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0967

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH Model MBB-BK117 A-1, MBB-BK117 A-3, MBB-BK117 A-4, MBB-BK117 B-1, MBB-BK117 B-2, MBB-BK117 C-1, and MBB-BK117 C-2 helicopters. This proposed AD would require inspecting the tail gearbox (TGB) bellcrank attachment arm (arm) for a crack. This proposed AD was prompted by a report of a cracked TGB arm. The actions of this proposed AD are intended to address an unsafe condition on these products.

## Notices in this docket

- Oct 26, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-23446, comments due Dec 10, 2020 (https://www.federalregister.gov/documents/2020/10/26/2020-23446/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters)

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