# Airworthiness Directives; Siemens S.A.S. Smoke Detectors
> **Rule** · Final rule. · Published 2017-09-26 · Effective 2017-10-31 · 82 FR 44717
## Document
- **Document number:** 2017-20425
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 82 FR 44717
- **Publication date:** 2017-09-26
- **Effective date:** 2017-10-31
- **FAA docket:** Docket No. FAA-2017-0099
## Abstract

We are adopting a new airworthiness directive (AD) for certain Siemens S.A.S. smoke detectors installed on various transport category airplanes. This AD requires inspection and replacement of the affected smoke detectors. This AD was prompted by a report that the affected smoke detectors failed an acceptance test. We are issuing this AD to correct the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2017/09/26/2017-20425/airworthiness-directives-siemens-sas-smoke-detectors)
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