# Proposed AD FAA-2021-0333: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-13-04
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 22, 2021, 86 FR 21238
- Comments due: June 7, 2021
- Became: [AD 2021-13-04](https://openairdocs.org/ad/2021-13-04)
- Docket: FAA-2021-0333 (https://www.regulations.gov/docket/FAA-2021-0333, where comments are filed)
- Project: MCAI-2020-00252-R
- FR document: 2021-08182
- Official PDF: https://openairdocs.org/files/sha256/9f/a2/9fa2251705b2f006ea816104283e69f5e81262973b1f1fa2a37e7cfb4f31dc66 (from https://www.govinfo.gov/content/pkg/FR-2021-04-22/pdf/2021-08182.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/04/22/2021-08182/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B32AB8456BBB3827862586BF007F38C2.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0333

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Helicopters Model AS332C, AS332C1, AS332L, and AS332L1 helicopters. This proposed AD was prompted by a report of a yaw control failure that was the result of the disconnection of the tail rotor hub (TRH) pitch control rod from the tail rotor servo-control, which resulted from a seized TRH bearing. The TRH bearing had grease dissolving after contamination by leaked hydraulic fluid from the tail rotor servo-control that came through the TRH assembly boot. This proposed AD would require repetitive inspections for hydraulic leaks, corrective actions if necessary, and an optional modification which constitutes terminating action, 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 22, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-08182, comments due Jun 7, 2021 (https://www.federalregister.gov/documents/2021/04/22/2021-08182/airworthiness-directives-airbus-helicopters)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.