# Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146-200A Series Airplanes
> **Rule** · Final rule. · Published 2002-01-30 · Effective 2002-03-06 · 67 FR 4332
## Document
- **Document number:** 02-1818
- **Category:** airworthiness
- **Manufacturer:** BAE Systems (Operations) Limited Model BAe 146-200A Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 67 FR 4332
- **Publication date:** 2002-01-30
- **Effective date:** 2002-03-06
- **FAA docket:** Docket No. 2001-NM-150-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain BAE Systems (Operations) Limited Model BAe 146- 200A series airplanes, that requires replacement of the signal summing units (SSUs) for the stall identification system with new, improved parts. The actions specified by this AD are intended 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.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/01/30/02-1818/airworthiness-directives-bae-systems-operations-limited-model-bae-146-200a-series-airplanes)
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