# Proposed AD 2002-NM-120-AD: Bombardier Model DHC-8-401 and -402 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2004-06-08
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 17, 2003, 68 FR 64825
- Comments due: December 17, 2003
- Became: [AD 2004-06-08](https://openairdocs.org/ad/2004-06-08)
- Docket: 2002-NM-120-AD
- FR document: 03-28608
- Official PDF: https://openairdocs.org/files/sha256/78/d3/78d366c2c6dde0a5176d9e60a445ed28a233b8c83d53f7f7b369ebec940ce7c5 (from https://www.govinfo.gov/content/pkg/FR-2003-11-17/pdf/03-28608.pdf)
- Federal Register: https://www.federalregister.gov/documents/2003/11/17/03-28608/airworthiness-directives-bombardier-model-dhc-8-401-and--402-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1C17CEA6DAE8148C86256DE1005B91E6.0001
- Page: https://openairdocs.org/proposed/2002-NM-120-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Bombardier Model DHC-8-401 and -402 airplanes. This proposal would require modifying the wiring of the rudder trim switch, inspecting all wiring on the back of the aileron/rudder trim control panel for chafing, and replacing any chafed wiring with new wiring. This action is necessary to prevent a short circuit on the aileron/rudder trim control panel that could cause a runaway condition of the rudder trim actuator, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Notices in this docket

- Nov 17, 2003: Notice of proposed rulemaking (NPRM). (first notice), FR document 03-28608, comments due Dec 17, 2003 (https://www.federalregister.gov/documents/2003/11/17/03-28608/airworthiness-directives-bombardier-model-dhc-8-401-and--402-airplanes)

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