# Proposed AD FAA-2020-0860: Bell Helicopter Textron Canada Limited Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-03-13
- Products: Bell Helicopter Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: October 1, 2020, 85 FR 61879
- Comments due: November 16, 2020
- Became: [AD 2021-03-13](https://openairdocs.org/ad/2021-03-13)
- Docket: FAA-2020-0860 (https://www.regulations.gov/docket/FAA-2020-0860, where comments are filed)
- FR document: 2020-21608
- Official PDF: https://openairdocs.org/files/sha256/44/63/44631d2e531ee1a3243028c2c580adebce7242f66e602b9f009f7a4dad455f34 (from https://www.govinfo.gov/content/pkg/FR-2020-10-01/pdf/2020-21608.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/10/01/2020-21608/airworthiness-directives-bell-helicopter-textron-canada-limited-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/74CDFA19ABE0FCA6862585F400437366.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0860

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Limited Model 429 helicopters. This proposed AD was prompted by the introduction of a new life limit for the centrifugal force bearing (CFB). This proposed AD would require determining the accumulated retirement index number (RIN) and removing each affected CFB from service before it accumulates 8,000 total RIN. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Oct 1, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-21608, comments due Nov 16, 2020 (https://www.federalregister.gov/documents/2020/10/01/2020-21608/airworthiness-directives-bell-helicopter-textron-canada-limited-helicopters)

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