# Proposed AD 2001-NM-150-AD: BAE Systems (Operations) Limited Model BAe 146-200A Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2002-01-20
- Products: BAE Systems
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 29, 2001, 66 FR 54466
- Comments due: November 28, 2001
- Became: [AD 2002-01-20](https://openairdocs.org/ad/2002-01-20)
- Docket: 2001-NM-150-AD
- FR document: 01-27072
- Official PDF: https://openairdocs.org/files/sha256/cf/30/cf305847be940ad1ba9227440fb3c26a95abd31587ca27fc98db1a526a8158be (from https://www.govinfo.gov/content/pkg/FR-2001-10-29/pdf/01-27072.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/10/29/01-27072/airworthiness-directives-bae-systems-operations-limited-model-bae-146-200a-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/57735E7FCA4F24E286256AF7005CA2A7.0001
- Page: https://openairdocs.org/proposed/2001-NM-150-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain BAE Systems (Operations) Limited Model BAe 146-200A series airplanes. This proposal would require replacement of the signal summing units (SSUs) for the stall identification system with new, improved parts. This action is necessary to prevent stall identification and stall warning signals from occurring at the same time, leading the flight crew to take action based on erroneous information, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Oct 29, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-27072, comments due Nov 28, 2001 (https://www.federalregister.gov/documents/2001/10/29/01-27072/airworthiness-directives-bae-systems-operations-limited-model-bae-146-200a-series-airplanes)

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