# Airworthiness Directives; Empresa Brasileira de Aeronautica, S.A. (EMBRAER) Model EMB-145 Series Airplanes
> **Rule** · Final rule. · Published 1998-06-25 · Effective 1998-07-30 · 63 FR 34558
## Document
- **Document number:** 98-16051
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 34558
- **Publication date:** 1998-06-25
- **Effective date:** 1998-07-30
- **FAA docket:** Docket No. 98-NM-65-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain EMBRAER Model EMB-145 series airplanes, that requires replacement of the horizontal stabilizer anti-icing valve with a new anti-icing valve. This amendment also requires reinforcement of the insulation over the anti-icing ducts of the horizontal stabilizer thermal anti-icing system. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the horizontal stabilizer anti-icing valve, which could cause the horizontal stabilizer thermal anti-icing system to be inoperative, and could result in reduced controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/06/25/98-16051/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes)
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