# Proposed AD FAA-2013-0526: Bell Helicopter Textron Canada (Bell) Model Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2013-22-01
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 20, 2013, 78 FR 37158
- Comments due: August 19, 2013
- Became: [AD 2013-22-01](https://openairdocs.org/ad/2013-22-01)
- Docket: FAA-2013-0526 (https://www.regulations.gov/docket/FAA-2013-0526, where comments are filed)
- Project: 2008-SW-14-AD
- FR document: 2013-14693
- Official PDF: https://openairdocs.org/files/sha256/98/48/9848697229e3eb2ea2861dcc5025e3471bfbc0c4b22b2ef077774ea6207b5396 (from https://www.govinfo.gov/content/pkg/FR-2013-06-20/pdf/2013-14693.pdf)
- Federal Register: https://www.federalregister.gov/documents/2013/06/20/2013-14693/airworthiness-directives-bell-helicopter-textron-canada-bell-model-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FEFD45F1AEB913A386257B900046DF46.0001
- Page: https://openairdocs.org/proposed/FAA-2013-0526

## Summary

We propose to adopt a new airworthiness directive (AD) for Bell Model 206L-4 and 407 helicopters. This proposed AD would require replacing or reworking certain aft bearing caps. This proposed AD is prompted by the manufacture of certain freewheel aft bearing caps without a lubrication channel to allow oil flow into the aft bearing support assembly. The proposed actions are intended to prevent failure of the freewheel unit and subsequent loss of control of the helicopter.

## Notices in this docket

- Jun 20, 2013: Notice of proposed rulemaking (NPRM). (first notice), FR document 2013-14693, comments due Aug 19, 2013 (https://www.federalregister.gov/documents/2013/06/20/2013-14693/airworthiness-directives-bell-helicopter-textron-canada-bell-model-helicopters)

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