# Proposed AD 2004-NM-37-AD: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 and EMB-135 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-14-03
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 27, 2004, 69 FR 22743
- Comments due: May 27, 2004
- Became: [AD 2005-14-03](https://openairdocs.org/ad/2005-14-03)
- Docket: 2004-NM-37-AD
- FR document: 04-9499
- Official PDF: https://openairdocs.org/files/sha256/05/92/0592fef0a1018b9eb1cb4ce3505ba9d99e2873beeb3490e12b45eef36b9267ca (from https://www.govinfo.gov/content/pkg/FR-2004-04-27/pdf/04-9499.pdf)
- Federal Register: https://www.federalregister.gov/documents/2004/04/27/04-9499/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-and-emb-135
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/68082EE1E27CCD2486256E83004CF3E6.0001
- Page: https://openairdocs.org/proposed/2004-NM-37-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 and EMB-135 series airplanes. This proposal would require replacement of the engine-driven hydraulic pump. This action is necessary to prevent oil leakage at the coupling seal between the hydraulic pump and the engine gearbox from causing low engine oil levels, which could lead to in-flight engine shutdown and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Apr 27, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-9499, comments due May 27, 2004 (https://www.federalregister.gov/documents/2004/04/27/04-9499/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-and-emb-135)

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