# Proposed AD FAA-2005-22256: Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes, and Model EMB-145, -145ER, -145MR, - 145LR, -145XR, -145MP, and -145EP Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-23-20
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 1, 2005, 70 FR 52040
- Comments due: October 3, 2005
- Became: [AD 2005-23-20](https://openairdocs.org/ad/2005-23-20)
- Docket: FAA-2005-22256 (https://www.regulations.gov/docket/FAA-2005-22256, where comments are filed)
- Project: 2005-NM-113-AD
- FR document: 05-17403
- Official PDF: https://openairdocs.org/files/sha256/bf/6f/bf6f9482e623d61e69212c8d063ab5642b0d0184d92771007b0571ac001219e7 (from https://www.govinfo.gov/content/pkg/FR-2005-09-01/pdf/05-17403.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/09/01/05-17403/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135-airplanes-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/906C10514A607C7F8625706F0067E1BB.0001
- Page: https://openairdocs.org/proposed/FAA-2005-22256

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain EMBRAER Model EMB-135 airplanes, and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes. This proposed AD would require modification of the upper frame of the firewall for the auxiliary power unit (APU). This proposed AD results from the discovery of a hole in the upper frame of the firewall for the APU. We are proposing this AD to prevent smoke from entering the passenger cabin in the event of a fire in the APU compartment.

## Notices in this docket

- Sep 1, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-17403, comments due Oct 3, 2005 (https://www.federalregister.gov/documents/2005/09/01/05-17403/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135-airplanes-and)

---
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.