# Proposed AD FAA-2022-0807: Bell Textron Canada Limited Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-20-04
- Products: Bell Textron Canada
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 30, 2022, 87 FR 39015
- Comments due: August 15, 2022
- Became: [AD 2022-20-04](https://openairdocs.org/ad/2022-20-04)
- Docket: FAA-2022-0807 (https://www.regulations.gov/docket/FAA-2022-0807, where comments are filed)
- Project: AD-2022-00214-R
- FR document: 2022-13858
- Official PDF: https://openairdocs.org/files/sha256/15/16/151623acfdf69e19f0c59ca715dbed8b120469091766a687b27fbc51b838d4e0 (from https://www.govinfo.gov/content/pkg/FR-2022-06-30/pdf/2022-13858.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/06/30/2022-13858/airworthiness-directives-bell-textron-canada-limited-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-13858-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0807

## Summary

The FAA proposes to supersede Airworthiness Directive (AD) 2021-26-08, which applies to certain Bell Textron Canada Limited Model 206, 206A, 206A-1, 206B, 206B-1, 206L, 206L-1, 206L-3, and 206L-4 helicopters. AD 2021-26-08 requires removing certain nuts from service; installing newly designed nuts; applying a specific torque, and a torque stripe to each newly installed nut; after the installation of each newly designed nut, inspecting the torque; and depending on the inspection results, either applying a torque stripe, or performing further inspections and removing certain parts from service. AD 2021- 26-08 also prohibits installing any affected nut on any tail rotor drive shaft (TRDS) disc pack (Thomas) coupling. Since the FAA issued AD 2021-26-089, the FAA determined certain torque values and part numbers (P/Ns) need to be revised. This proposed AD would require removing certain nuts from service; installing newly designed nuts; applying torque and a torque stripe; and additional corrective actions if necessary. This proposed AD would also prohibit installing any affected nut on any TRDS Thomas coupling, as specified in a Transport Canada AD, which is proposed for incorporation by reference (IBR). The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 30, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-13858, comments due Aug 15, 2022 (https://www.federalregister.gov/documents/2022/06/30/2022-13858/airworthiness-directives-bell-textron-canada-limited-helicopters)

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