# Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes
> **Rule** · Final rule. · Published 2017-09-06 · Effective 2017-10-11 · 82 FR 42029
## Document
- **Document number:** 2017-18624
- **Category:** airworthiness
- **Manufacturer:** Diamond
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 42029
- **Publication date:** 2017-09-06
- **Effective date:** 2017-10-11
- **FAA docket:** Docket No. FAA-2017-0638
## Abstract

We are adopting a new airworthiness directive (AD) for certain Diamond Aircraft Industries GmbH Models DA 42, DA 42 M-NG, and DA 42 NG airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as crack formation on the flap bell crank, which could cause the flap bell crank to fail. We are issuing this AD to require actions to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/09/06/2017-18624/airworthiness-directives-diamond-aircraft-industries-gmbh-airplanes)
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