# Airworthiness Directives; Viking Air Limited Airplanes
> **Rule** · Final rule. · Published 2018-02-20 · Effective 2018-03-27 · 83 FR 7107
## Document
- **Document number:** 2018-03329
- **Category:** airworthiness
- **Manufacturer:** Viking Air Limited
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 83 FR 7107
- **Publication date:** 2018-02-20
- **Effective date:** 2018-03-27
- **FAA docket:** Docket No. FAA-2017-1038
## Abstract

We are adopting a new airworthiness directive (AD) for Viking Air Limited Models DHC-6-1, DHC-6-100, DHC-6-200, DHC-6-300, and DHC-6- 400 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and address an unsafe condition on an aviation product. The MCAI describes the unsafe condition as aileron cable wear; fouling at the wing root rib, fuselage skin, and wing root rib fairlead; and/or fraying of the cable from the root rib fairlead. 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/2018/02/20/2018-03329/airworthiness-directives-viking-air-limited-airplanes)
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