# Proposed AD 98-NM-65-AD: Empresa Brasileira de Aeronautica, S.A. (EMBRAER) Model EMB-145 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-13-16
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 21, 1998, 63 FR 19673
- Comments due: May 21, 1998
- Became: [AD 98-13-16](https://openairdocs.org/ad/98-13-16)
- Docket: 98-NM-65-AD
- FR document: 98-10468
- Official PDF: https://openairdocs.org/files/sha256/ac/13/ac139bbe92b3d23e3fb30c184d2896b321cda5070b30ea9f69aa55869a3d769d (from https://www.govinfo.gov/content/pkg/FR-1998-04-21/pdf/98-10468.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/04/21/98-10468/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes
- Page: https://openairdocs.org/proposed/98-NM-65-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 series airplanes. This proposal would require replacement of the horizontal stabilizer anti-icing valve with a new anti-icing valve. This proposal also would require reinforcement of the insulation over the anti-icing ducts of the horizontal stabilizer thermal anti-icing system. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed 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.

## Notices in this docket

- Apr 21, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-10468, comments due May 21, 1998 (https://www.federalregister.gov/documents/1998/04/21/98-10468/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes)

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