# Proposed AD FAA-2005-20481: Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, -311, and -315 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-10-08
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 8, 2005, 70 FR 11168
- Comments due: April 7, 2005
- Became: [AD 2005-10-08](https://openairdocs.org/ad/2005-10-08)
- Docket: FAA-2005-20481 (https://www.regulations.gov/docket/FAA-2005-20481, where comments are filed)
- Project: 2004-NM-183-AD
- FR document: 05-4407
- Official PDF: https://openairdocs.org/files/sha256/19/a6/19a6df3892a85e966064374dd4f7b64d44e2a07dfa8b5905e79ea69ecbafd7c3 (from https://www.govinfo.gov/content/pkg/FR-2005-03-08/pdf/05-4407.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/03/08/05-4407/airworthiness-directives-bombardier-model-dhc-8-102--103--106--201--202--301--311-and--315-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/61449535A23EE56C86256FBE005CC7EA.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20481

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model DHC-8-102, -103, -106, -201, -202, -301, - 311, and -315 airplanes. This proposed AD would require operators to install torque tube catchers on the control columns of the flight controls. This proposed AD is prompted by the discovery that a single malfunction of the torque tube could result in both flight control columns being supported by only one self-aligning bearing. We are proposing this AD to prevent the torque tube from fouling against the underfloor control cables, which could result in reduced controllability of the airplane.

## Notices in this docket

- Mar 8, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-4407, comments due Apr 7, 2005 (https://www.federalregister.gov/documents/2005/03/08/05-4407/airworthiness-directives-bombardier-model-dhc-8-102--103--106--201--202--301--311-and--315-airplanes)

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