# Proposed AD FAA-2010-0170: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135ER, -135KE, -135KL, and -135LR Airplanes; and EMBRAER Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and - 145EP Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-12-07
- Products: Embraer - Empresa Brasileira de Aeronautica
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: February 25, 2010, 75 FR 8557
- Comments due: April 12, 2010
- Became: [AD 2010-12-07](https://openairdocs.org/ad/2010-12-07)
- Docket: FAA-2010-0170 (https://www.regulations.gov/docket/FAA-2010-0170, where comments are filed)
- Project: 2009-NM-127-AD
- FR document: 2010-3826
- Official PDF: https://openairdocs.org/files/sha256/90/02/9002231b7d8eec792e01c55875bfc0ba8e124ec5cde20a7156cd3e1cc77edec1 (from https://www.govinfo.gov/content/pkg/FR-2010-02-25/pdf/2010-3826.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/02/25/2010-3826/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135er--135ke--135kl
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B1A8F7931481F716862576D5005A395A.0001
- Page: https://openairdocs.org/proposed/FAA-2010-0170

## Summary

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Reassessment of the damage tolerance analysis resulted in threshold reduction for some Structure Significant Items (SSI) of the Maintenance Review Board Report (MRBR) Airworthiness Limitations Items (ALI). Failure to inspect these structural components, according to the new threshold, could prevent a timely detection of fatigue cracking. These cracks, if not properly addressed, could adversely affect the structural integrity of the airplane. * * * * *

The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Feb 25, 2010: Notice of proposed rulemaking (NPRM). (first notice), FR document 2010-3826, comments due Apr 12, 2010 (https://www.federalregister.gov/documents/2010/02/25/2010-3826/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135er--135ke--135kl)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.