# Proposed AD 99-NM-305-AD: EMBRAER Model EMB-145 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-09-09
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 29, 1999, 64 FR 72964
- Comments due: January 28, 2000
- Became: [AD 2000-09-09](https://openairdocs.org/ad/2000-09-09)
- Docket: 99-NM-305-AD
- FR document: 99-33733
- Official PDF: https://openairdocs.org/files/sha256/df/dc/dfdccfa4c627814ef51e8fdc073b26210bd349b853470502ed4a44bbddb4efe9 (from https://www.govinfo.gov/content/pkg/FR-1999-12-29/pdf/99-33733.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/12/29/99-33733/airworthiness-directives-embraer-model-emb-145-series-airplanes
- Page: https://openairdocs.org/proposed/99-NM-305-AD

## Summary

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain EMBRAER Model EMB- 145 series airplanes, that currently requires revisions to the Airplane Flight Manual (AFM) to provide the flight crew with updated procedures for prohibiting use of the autopilot below 1,500 feet above ground level, emergency procedures for pitch trim runaway, and abnormal procedures for autopilot trim failure and stabilizer out of trim. That AD also requires installation of certain warning placards. This action would require replacement of a certain integrated computer with a new integrated computer; installation of an upgraded integrated computers checklist; and removal of certain placards and certain limitations in the AFM. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent failure of the pitch trim system, which could cause undetected autopilot trim runaway, and consequent reduced controllability of the airplane, uncommanded autopilot disconnect, and excessive altitude loss.

## Notices in this docket

- Dec 29, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-33733, comments due Jan 28, 2000 (https://www.federalregister.gov/documents/1999/12/29/99-33733/airworthiness-directives-embraer-model-emb-145-series-airplanes)

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