# Proposed AD 2001-NM-271-AD: BAE Systems (Operations) Limited Model BAe 146 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2003-12-09
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 12, 2003, 68 FR 11760
- Comments due: April 11, 2003
- Became: [AD 2003-12-09](https://openairdocs.org/ad/2003-12-09)
- Docket: 2001-NM-271-AD
- FR document: 03-5859
- Official PDF: https://openairdocs.org/files/sha256/b3/25/b325ef7af822d37c27435595bef30e2bd587d2bc847ab2493fee2751009101d7 (from https://www.govinfo.gov/content/pkg/FR-2003-03-12/pdf/03-5859.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/03/12/03-5859/airworthiness-directives-bae-systems-operations-limited-model-bae-146-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4437D0FA172767C886256CE7004EB7C7.0001
- Page: https://openairdocs.org/proposed/2001-NM-271-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain BAE Systems (Operations) Limited Model BAe 146 series airplanes. This proposal would require modification of the flight annunciator box. This action is necessary to prevent traffic collision avoidance system (TCAS) aural messages and resolution advisories of the TCAS from being inhibited following a ground proximity warning system alert or test message, which could prevent the TCAS from providing attention-getting alerts, and could result in the consequent possibility of a mid-air collision or near mid-air collision. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Mar 12, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-5859, comments due Apr 11, 2003 (https://www.federalregister.gov/documents/2003/03/12/03-5859/airworthiness-directives-bae-systems-operations-limited-model-bae-146-series-airplanes)

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