# Proposed AD FAA-2014-0446: Bombardier, Inc. Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2015-02-02
- Products: Bombardier
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: July 15, 2014, 79 FR 41145
- Comments due: August 29, 2014
- Became: [AD 2015-02-02](https://openairdocs.org/ad/2015-02-02)
- Docket: FAA-2014-0446 (https://www.regulations.gov/docket/FAA-2014-0446, where comments are filed)
- Project: 2013-NM-077-AD
- FR document: 2014-16539
- Official PDF: https://openairdocs.org/files/sha256/4f/bc/4fbc6cf0a391464b06262c072884140466a5fbf15d1528c88f7ae6d73ad0b17d (from https://www.govinfo.gov/content/pkg/FR-2014-07-15/pdf/2014-16539.pdf)
- Federal Register: https://www.federalregister.gov/documents/2014/07/15/2014-16539/airworthiness-directives-bombardier-inc-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3000D8C159478B7886257D16004F037D.0001
- Page: https://openairdocs.org/proposed/FAA-2014-0446

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-215-6B11 (CL-215T Variant), and CL- 215-6B11 (CL-415 Variant) airplanes. This proposed AD was prompted by a report that during a routine inspection, corrosion was discovered on the lower bearing of the rudder upper torque tube. This proposed AD would require applying grease to the bearing; doing a general visual inspection of the expelled old grease for any contaminants, metal wear, and indication of corrosion, and replacing the bearing if necessary; revising the maintenance or inspection program, as applicable, to incorporate the rudder spring tab operational test and a check of the rudder spring tab operation into the daily inspection. We are proposing this AD to prevent corroded bearings, which could result in a partial or total loss of axial support.

## Notices in this docket

- Jul 15, 2014: Notice of proposed rulemaking (NPRM). (first notice), FR document 2014-16539, comments due Aug 29, 2014 (https://www.federalregister.gov/documents/2014/07/15/2014-16539/airworthiness-directives-bombardier-inc-airplanes)

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