# Proposed AD FAA-2005-22917: Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL- 604) Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-02-04
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 10, 2005, 70 FR 68377
- Comments due: December 12, 2005
- Became: [AD 2006-02-04](https://openairdocs.org/ad/2006-02-04)
- Docket: FAA-2005-22917 (https://www.regulations.gov/docket/FAA-2005-22917, where comments are filed)
- Project: 2005-NM-157-AD
- FR document: 05-22445
- Official PDF: https://openairdocs.org/files/sha256/54/aa/54aa621d3fefc6ab3aa83af6c6254e541e359e9a637f3b5bb6078a99aa08a3c8 (from https://www.govinfo.gov/content/pkg/FR-2005-11-10/pdf/05-22445.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/11/10/05-22445/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3CAB468A8F4D6679862570B5005DE9C7.0001
- Page: https://openairdocs.org/proposed/FAA-2005-22917

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model CL-600-1A11 (CL-600), CL-600-2A12 (CL- 601), and CL-600-2B16 (CL-601-3A, CL-601-3R, & CL-604) airplanes. This proposed AD would require modifying the rudder balance spring assembly by installing a new adjustable balance spring, and rigging the assembly to suit the rudder of each airplane. This proposed AD results from production inspections that showed that the spring assembly that controls rudder balance may not have the correct pre-load on some airplanes. We are proposing this AD to prevent uncommanded yaw movements and consequent reduced controllability of the airplane.

## Notices in this docket

- Nov 10, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-22445, comments due Dec 12, 2005 (https://www.federalregister.gov/documents/2005/11/10/05-22445/airworthiness-directives-bombardier-model-cl-600-1a11-cl-600-cl-600-2a12-cl-601-and-cl-600-2b16)

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