# Airworthiness Directives; BAE Systems (Operations) Limited Model Avro 146-RJ Series Airplanes; and BAE Systems (Operations) Limited Model BAe 146 Series Airplanes
> **Rule** · Final rule. · Published 2004-03-26 · Effective 2004-04-30 · 69 FR 15659
## Document
- **Document number:** 04-6582
- **Category:** airworthiness
- **Manufacturer:** BAE Systems (Operations) Limited Model Avro 146-RJ Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 69 FR 15659
- **Publication date:** 2004-03-26
- **Effective date:** 2004-04-30
- **FAA docket:** Docket No. 2001-NM-317-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain BAE Systems (Operations) Limited Model Avro 146- RJ and Model BAe 146 series airplanes, that requires a test to determine the torque setting for the collar cap screw of the differential box for the nose landing gear, and follow-on actions. This action is necessary to prevent uncommanded inputs to the nosewheel steering, which could result in reduced controllability of the airplane during takeoff and landing. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2004/03/26/04-6582/airworthiness-directives-bae-systems-operations-limited-model-avro-146-rj-series-airplanes-and-bae)
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