# Airworthiness Directives; British Aerospace Model BAe 146 and Avro 146-RJ Series Airplanes
> **Rule** · Final rule. · Published 1999-10-28 · Effective 1999-12-02 · 64 FR 57972
## Document
- **Document number:** 99-27789
- **Category:** airworthiness
- **Manufacturer:** British Aerospace Model BAe 146 and Avro 146-RJ Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 64 FR 57972
- **Publication date:** 1999-10-28
- **Effective date:** 1999-12-02
- **FAA docket:** Docket No. 99-NM-27-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model BAe 146 and Avro 146-RJ series airplanes, that requires installation of modified roller sub- assemblies in both the main landing gear (MLG) door lock and the MLG uplock. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent failure of the roller sub-assemblies, which could result in failure of the MLG to retract and lock after takeoff, or to deploy properly for landing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/10/28/99-27789/airworthiness-directives-british-aerospace-model-bae-146-and-avro-146-rj-series-airplanes)
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