# Proposed AD FAA-2021-1007: Airbus Helicopters Deutschland GmbH Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-02-20
- Products: Airbus Helicopters Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 26, 2021, 86 FR 67364
- Comments due: January 10, 2022
- Became: [AD 2022-02-20](https://openairdocs.org/ad/2022-02-20)
- Docket: FAA-2021-1007 (https://www.regulations.gov/docket/FAA-2021-1007, where comments are filed)
- Project: MCAI-2021-00324-R
- FR document: 2021-25206
- Official PDF: https://openairdocs.org/files/sha256/94/f9/94f9676c22d49972a4bb14566ead66a00afc85fff801babcbf9fbab7b154e4e3 (from https://www.govinfo.gov/content/pkg/FR-2021-11-26/pdf/2021-25206.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/11/26/2021-25206/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2021-25206-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2021-1007

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Deutschland GmbH Model MBB-BK 117 C-2 and MBB-BK 117 D-2 helicopters. This proposed AD was prompted by report that a collective bellcrank-K was found incorrectly installed on a helicopter. This proposed AD would require inspecting the collective bellcrank-K to determine if it is correctly installed and has a correct position marking and, depending on the findings, applicable corrective actions, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). This proposed AD would also allow installation of an affected collective bellcrank-K, provided certain instructions are followed. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Nov 26, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-25206, comments due Jan 10, 2022 (https://www.federalregister.gov/documents/2021/11/26/2021-25206/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters)

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