# Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters
> **Rule** · Final rule; request for comments. · Published 2013-05-24 · Effective 2013-06-10 · 78 FR 31394
## Document
- **Document number:** 2013-12307
- **Category:** airworthiness
- **Manufacturer:** Eurocopter Deutschland GmbH
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 78 FR 31394
- **Publication date:** 2013-05-24
- **Effective date:** 2013-06-10
- **FAA docket:** Docket No. FAA-2013-0445
## Abstract

We are adopting a new airworthiness directive (AD) for Eurocopter Deutschland GmbH (ECD) Model MBB-BK 117 C-2 helicopters. This AD requires revising the operating limitations to prohibit flights under instrument flight rules (IFR) or under night visual flight rules (VFR) when the autotrim is inoperative. The actions of this AD are intended to prevent a workload situation whereby stabilizing the helicopter in flight would be difficult if not impossible, resulting in possible loss of helicopter control.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/05/24/2013-12307/airworthiness-directives-eurocopter-deutschland-gmbh-helicopters)
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