# Proposed AD 2002-NM-172-AD: BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-04-07
- Products: BAE Systems
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking; reopening of comment period.
- Published: December 8, 2005, 70 FR 72942
- Comments due: January 3, 2006
- Became: [AD 2006-04-07](https://openairdocs.org/ad/2006-04-07)
- Docket: 2002-NM-172-AD
- FR document: 05-23776
- Official PDF: https://openairdocs.org/files/sha256/c0/56/c056afeec6a175591ea3467f6ae403bdc4cd7841a7324651df85ddd0ef6e76e6 (from https://www.govinfo.gov/content/pkg/FR-2005-12-08/pdf/05-23776.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/12/08/05-23776/airworthiness-directives-bae-systems-operations-limited-model-bae-146-and-avro-146-rj-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/89AD91D77A3FC27D862570D1005EFD3C.0001
- Page: https://openairdocs.org/proposed/2002-NM-172-AD

## Summary

This document revises an earlier proposed airworthiness directive (AD), applicable to all BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ airplanes, that would have required installation of a linear fluid-filled damper between each elevator surface and the airplane structure on both the left and right sides of the airplane, along with related structural and system modifications. This new action revises the proposed rule by updating and adding service information, and changing the compliance time. The actions specified by this new proposed AD are intended to prevent pitch oscillation (vertical bouncing) of the fuselage due to excessive ice buildup on the elevator servo tab, and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Jun 2, 2004: Notice of proposed rulemaking (NPRM). (first notice), FR document 04-12446, comments due Jul 2, 2004 (https://www.federalregister.gov/documents/2004/06/02/04-12446/airworthiness-directives-bae-systems-operations-limited-model-bae-146-and-avro-146-rj-series)
- Dec 8, 2005: Supplemental notice of proposed rulemaking; reopening of comment period., FR document 05-23776, comments due Jan 3, 2006 (https://www.federalregister.gov/documents/2005/12/08/05-23776/airworthiness-directives-bae-systems-operations-limited-model-bae-146-and-avro-146-rj-airplanes)

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