# Proposed AD FAA-2005-21139: Bombardier Model CL600-1A11 (CL-600), Model CL-600-2A12 (CL-601), and Model CL-600-2B16 (CL-601-3A, CL-601- 3R, and CL-604) Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-15-04
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
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- Published: May 18, 2005, Federal Register: May 19, 2005 (Volume 70, Number 96)
- Comments due: June 7, 2005
- Became: [AD 2005-15-04](https://openairdocs.org/ad/2005-15-04)
- Docket: FAA-2005-21139 (https://www.regulations.gov/docket/FAA-2005-21139, where comments are filed)
- Project: 2003-NM-196-AD
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F6253B71D70BE80986256FFC006BCE60.0001
- Page: https://openairdocs.org/proposed/FAA-2005-21139

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model CL600-1A11 (CL-600), Model CL-600-2A12 (CL-601), and Model CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604) series airplanes. This proposed AD would require operators to assign serial numbers or part numbers to certain landing gear parts; and to establish the number of landings on the parts, if necessary. This proposed AD also would require operators to revise the Airworthiness Limitations section of the Instructions for Continued Airworthiness to reflect the new life limits of the landing gear parts. This proposed AD is prompted by reports that landing gear parts that have safe-life limits but do not have serial numbers or part numbers can be removed from one landing gear and re-installed on another, making tracking difficult. We are proposing this AD to prevent life-limited landing gear parts from being used beyond their safe-life limits, which could lead to collapse of the landing gear.

## Notices in this docket

- May 9, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-9186, comments due Jun 8, 2005 (https://www.federalregister.gov/documents/2005/05/09/05-9186/airworthiness-directives-bombardier-model-cl600-1a11-cl-600-model-cl-600-2a12-cl-601-and-model)
- May 18, 2005: Notice of proposed rulemaking (NPRM).
-----------------------------------------------------------------------, comments due Jun 7, 2005 (https://drs.faa.gov/browse/excelExternalWindow/F6253B71D70BE80986256FFC006BCE60.0001)

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