# Airworthiness Directives; Zodiac Aerotechnics Oxygen Mask Regulators
> **Rule** · Final rule. · Published 2019-02-20 · Effective 2019-03-27 · 84 FR 4987
## Document
- **Document number:** 2019-02748
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 84 FR 4987
- **Publication date:** 2019-02-20
- **Effective date:** 2019-03-27
- **FAA docket:** Docket No. FAA-2017-0505
## Abstract

We are adopting a new airworthiness directive (AD) for certain Zodiac Aerotechnics (Zodiac) oxygen mask regulators. This AD was prompted by reports that certain silicon harness inflation hoses installed on certain flight crew quick donning mask harnesses have shown an unusually high premature rupture rate. This AD requires inspection and replacement of certain oxygen mask regulator harness inflation hoses. We are issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/02/20/2019-02748/airworthiness-directives-zodiac-aerotechnics-oxygen-mask-regulators)
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