# Proposed AD FAA-2022-0295: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-13-14
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 11, 2022, 87 FR 21052
- Comments due: May 26, 2022
- Became: [AD 2022-13-14](https://openairdocs.org/ad/2022-13-14)
- Docket: FAA-2022-0295 (https://www.regulations.gov/docket/FAA-2022-0295, where comments are filed)
- Project: MCAI-2021-00840-R
- FR document: 2022-07576
- Official PDF: https://openairdocs.org/files/sha256/a7/bc/a7bcd6c5d938475eb83d14ab0c71d35b0a060bd9e50bb2d12b1d5a9e940a5b6e (from https://www.govinfo.gov/content/pkg/FR-2022-04-11/pdf/2022-07576.pdf)
- Federal Register: https://www.federalregister.gov/documents/2022/04/11/2022-07576/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2022-07576-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2022-0295

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Model AS-365N2, AS 365 N3, EC 155B, EC155B1, and SA-365N1 helicopters. This proposed AD was prompted by a large amount of critical scale particles found on the tail rotor gearbox (TGB) chip detector magnetic plug during an unscheduled check of the TGB. The particles belonged to the double bearing (pitch control rod bearing) installed inside the TGB. This proposed AD would require repetitive inspections of the TGB chip detector for particles, analyzing any particles collected, performing a double bearing washing, repetitive replacements of certain part-numbered double bearings, and corrective actions if necessary, as specified in a European Union Aviation Safety Agency (EASA) 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

- Apr 11, 2022: Notice of proposed rulemaking (NPRM). (first notice), FR document 2022-07576, comments due May 26, 2022 (https://www.federalregister.gov/documents/2022/04/11/2022-07576/airworthiness-directives-airbus-helicopters)

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