# Proposed AD FAA-2006-25925: 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 2007-04-03
- Products: Embraer
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 28, 2006, 71 FR 56900
- Comments due: October 30, 2006
- Became: [AD 2007-04-03](https://openairdocs.org/ad/2007-04-03)
- Docket: FAA-2006-25925 (https://www.regulations.gov/docket/FAA-2006-25925, where comments are filed)
- Project: 2006-NM-167-AD
- FR document: E6-15947
- Official PDF: https://openairdocs.org/files/sha256/7f/65/7f65e7f022adf07935062241c8c24fa89342bafad5a6585365a9eec900756d07 (from https://www.govinfo.gov/content/pkg/FR-2006-09-28/pdf/E6-15947.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/09/28/E6-15947/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135-airplanes-and
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C429110EC0B387B5862571F7005C57E0.0001
- Page: https://openairdocs.org/proposed/FAA-2006-25925

## Summary

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to all EMBRAER Model EMB-135 airplanes and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP airplanes. The existing AD requires repetitive inspections of the pitot static heating relay K0057 and corrective actions if necessary. The existing AD also requires doing a terminating modification, which ends the repetitive inspections. This proposed AD would remove the existing repetitive inspections and instead would require a one-time detailed inspection for damage of the relay, relay socket, and silicone gasket; applicable corrective actions; and a new action to modify and re- identify the relay socket. This proposed AD would also revise the existing terminating modification--replacing/rerouting the windowsill drain hoses--into two parts, each with a different, reduced compliance time. This proposed AD results from a report of smoke in the cockpit. We are proposing this AD to prevent ignition of a windowsill drain hose by an overheated relay, which could cause fire and smoke in the cockpit.

## Notices in this docket

- Sep 28, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-15947, comments due Oct 30, 2006 (https://www.federalregister.gov/documents/2006/09/28/E6-15947/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135-airplanes-and)

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