# Proposed AD FAA-2018-0438: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-19-10
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 17, 2018, 83 FR 22886
- Comments due: July 16, 2018
- Became: [AD 2018-19-10](https://openairdocs.org/ad/2018-19-10)
- Docket: FAA-2018-0438 (https://www.regulations.gov/docket/FAA-2018-0438, where comments are filed)
- FR document: 2018-10494
- Official PDF: https://openairdocs.org/files/sha256/f1/3c/f13cccca291f03431e127145bfc86fa77fb1de5f16404d7de6f06b3d1bbe08e3 (from https://www.govinfo.gov/content/pkg/FR-2018-05-17/pdf/2018-10494.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/05/17/2018-10494/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FC11C69A7A658120862582900049FF73.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0438

## Summary

We propose to adopt a new airworthiness directive (AD) for Airbus Helicopters Model AS355E, AS355F, AS355F1, AS355F2, and AS355N helicopters. This proposed AD would require measuring a vibration level in the tail rotor (T/R) drive. This proposed AD is prompted by reports of bearing degradation. The actions of this proposed AD are intended to prevent an unsafe condition on these helicopters.

## Notices in this docket

- May 17, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-10494, comments due Jul 16, 2018 (https://www.federalregister.gov/documents/2018/05/17/2018-10494/airworthiness-directives-airbus-helicopters)

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