# Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and EMB-145 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 2000-06-27 · Effective 2000-07-03 · 65 FR 39541
## Document
- **Document number:** 00-16110
- **Category:** airworthiness
- **Manufacturer:** Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 and EMB-145 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 65 FR 39541
- **Publication date:** 2000-06-27
- **Effective date:** 2000-07-03
- **FAA docket:** Docket No. 2000-NM-208-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-135 and EMB-145 series airplanes. This action requires revising the Airplane Flight Manual, and eventual disconnection of the precooler differential pressure switches. This action is necessary to prevent incorrect operation of the precooler differential pressure switches, which could result in inappropriate automatic shutoff of the engine bleed valve, and consequent inability to restart a failed engine using cross-bleed from the other engine or possible failure of the anti-ice system. This action is also necessary to ensure that the flight crew is advised of the procedures necessary to restart an engine in flight using the auxiliary power unit.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/06/27/00-16110/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-135-and-emb-145)
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