# Proposed AD FAA-2021-1018: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2022-03-17
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: December 1, 2021, 86 FR 68166
- Comments due: January 18, 2022
- Became: [AD 2022-03-17](https://openairdocs.org/ad/2022-03-17)
- Docket: FAA-2021-1018 (https://www.regulations.gov/docket/FAA-2021-1018, where comments are filed)
- Project: MCAI-2021-00902-R
- FR document: 2021-26037
- Official PDF: https://openairdocs.org/files/sha256/58/f4/58f40d21823bcf560589b986a02f7318ea8e8aa7abcbc436149b8708ff052d73 (from https://www.govinfo.gov/content/pkg/FR-2021-12-01/pdf/2021-26037.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/12/01/2021-26037/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FR-ADNPRM-2021-26037-00000000000.0001
- Page: https://openairdocs.org/proposed/FAA-2021-1018

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus Helicopters Model AS332L2 and EC225LP helicopters. This proposed AD was prompted by a report of loss of tightening torque on the nut that attaches the tail gear box (TGB) bevel wheel. This proposed AD would require repetitive inspections (measurements) of the angular clearances of the TGB, and, depending on the findings, replacement of the TGB with a serviceable TGB, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference (IBR). This proposed AD would also provide terminating action for certain repetitive inspections. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Dec 1, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-26037, comments due Jan 18, 2022 (https://www.federalregister.gov/documents/2021/12/01/2021-26037/airworthiness-directives-airbus-helicopters)

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