# Airworthiness Directives; Bombardier, Inc. Airplanes
> **Rule** · Final rule. · Published 2017-03-27 · Effective 2017-05-01 · 82 FR 15115
## Document
- **Document number:** 2017-05524
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 15115
- **Publication date:** 2017-03-27
- **Effective date:** 2017-05-01
- **FAA docket:** Docket No. FAA-2016-9054
## Abstract

We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model DHC-8-400 series airplanes. This AD was prompted by reports of interior emergency lights remaining "ON" following routine operational checks of the emergency light system. This AD requires changing the wiring gauge for the affected emergency lights power supplies wiring to prevent overheating in the wires. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/03/27/2017-05524/airworthiness-directives-bombardier-inc-airplanes)
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