# Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 Series Airplanes
> **Rule** · Final rule; request for comments. · Published 1999-10-01 · Effective 1999-10-18 · 64 FR 53193
## Document
- **Document number:** 99-25593
- **Category:** airworthiness
- **Manufacturer:** Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 64 FR 53193
- **Publication date:** 1999-10-01
- **Effective date:** 1999-10-18
- **FAA docket:** Docket No. 99-NM-198-AD
## Abstract

This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 series airplanes. This action requires revising the Airplane Flight Manual (AFM) for operation in the rain, and modifying the anemometric static ports. This action also provides for optional terminating action for the requirements of this AD. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to limit or prohibit the use of the autopilot and flight director during the descent and approach to land in the rain, and to prevent fluctuations and erratic indications in the vertical speed, airspeed, and altitude readings in the cockpit during the descent and approach to land in the rain; such conditions could result in reduced controllability of the airplane during the descent and approach to land in the rain.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/10/01/99-25593/airworthiness-directives-empresa-brasileira-de-aeronautica-sa-embraer-model-emb-145-series-airplanes)
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