# Proposed AD 2004-NM-36-AD: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ and EMB-145XR Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-21-04
- Products: Embraer
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: May 26, 2006, 71 FR 30335
- Comments due: June 20, 2006
- Became: [AD 2006-21-04](https://openairdocs.org/ad/2006-21-04)
- Docket: 2004-NM-36-AD
- FR document: E6-8117
- Official PDF: https://openairdocs.org/files/sha256/fa/54/fa54ded087c4c3591df2978b62ed2f989df21bb8e2da7ed36251382d932bfa3d (from https://www.govinfo.gov/content/pkg/FR-2006-05-26/pdf/E6-8117.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/05/26/E6-8117/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135bj-and-emb-145xr
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/68A5CBC8DABA2D6D8625717A00547365.0001
- Page: https://openairdocs.org/proposed/2004-NM-36-AD

## Summary

This document revises an earlier supplemental notice of proposed rulemaking (NPRM), applicable to certain Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ and Model EMB-145XR airplanes. The first supplemental NPRM would have required, for all airplanes, installation of an additional indication device to the clear-ice indication system. For certain airplanes, the first supplemental NPRM would also have required replacing the existing clear-ice indication lamp with a new, improved lamp. For certain other airplanes, the first supplemental NPRM would also have required modifying certain electrical connections to add an indication device to the clear-ice indication system; removing a certain placard; and re- activating the clear-ice additional indicator lamp. This new action revises the first supplemental NPRM by adding airplanes to the applicability. The actions specified by this new proposed supplemental NPRM are intended to prevent undetected build-up of clear ice on the wing surfaces, which could lead to reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- May 3, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-9905, comments due Jun 2, 2004 (https://www.federalregister.gov/documents/2004/05/03/04-9905/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135bj-and-emb-145xr)
- Jun 22, 2005: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 05-12314, comments due Jul 18, 2005 (https://www.federalregister.gov/documents/2005/06/22/05-12314/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135bj-and-emb-145xr)
- May 26, 2006: Supplemental notice of proposed rulemaking; reopening of comment period., FR document E6-8117, comments due Jun 20, 2006 (https://www.federalregister.gov/documents/2006/05/26/E6-8117/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135bj-and-emb-145xr)

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