# Proposed AD FAA-2015-0669: Airbus Helicopters Deutschland GmbH (Previously Eurocopter Deutschland GmbH) Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-01-14
- Products: Airbus Helicopters Deutschland
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 24, 2015, 80 FR 15530
- Comments due: May 26, 2015
- Became: [AD 2016-01-14](https://openairdocs.org/ad/2016-01-14)
- Docket: FAA-2015-0669 (https://www.regulations.gov/docket/FAA-2015-0669, where comments are filed)
- Project: 2013-SW-038-AD
- FR document: 2015-06567
- Official PDF: https://openairdocs.org/files/sha256/72/fa/72fa8edb43e0892b9b90927f8a615541dc76052a9e52b7e862b5b1b66a6274c3 (from https://www.govinfo.gov/content/pkg/FR-2015-03-24/pdf/2015-06567.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/03/24/2015-06567/airworthiness-directives-airbus-helicopters-deutschland-gmbh-previously-eurocopter-deutschland-gmbh
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BD15EAD8DC09FFF786257E12004A255A.0001
- Page: https://openairdocs.org/proposed/FAA-2015-0669

## Summary

We propose to adopt a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (AHD) (previously Eurocopter Deutschland GmbH) Model MBB-BK 117 A-1, A-3, A-4, B-1, B-2, C-1, and C- 2 helicopters. This proposed AD would require an initial and recurring inspection of the N2 control arm and, depending on the outcome of the inspection, repairing or replacing the N2 control arm. This proposed AD is prompted by a report of a heavily corroded and broken N2 control arm. The proposed actions are intended to detect corrosion, a crack, or a scratch in the N2 control arm, which could lead to failure of the N2 control arm, a drop in rotor speed, and subsequent loss of control of the helicopter.

## Notices in this docket

- Mar 24, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-06567, comments due May 26, 2015 (https://www.federalregister.gov/documents/2015/03/24/2015-06567/airworthiness-directives-airbus-helicopters-deutschland-gmbh-previously-eurocopter-deutschland-gmbh)

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