# Proposed AD FAA-2020-0618: Airbus Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2020-21-15
- Products: Airbus Helicopters
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 23, 2020, 85 FR 37591
- Comments due: August 7, 2020
- Became: [AD 2020-21-15](https://openairdocs.org/ad/2020-21-15)
- Docket: FAA-2020-0618 (https://www.regulations.gov/docket/FAA-2020-0618, where comments are filed)
- FR document: 2020-13438
- Official PDF: https://openairdocs.org/files/sha256/8d/d1/8dd1abb51021bfd80dd66980d5329ebf5ce6848733a09ce9e984e927c8e47bd7 (from https://www.govinfo.gov/content/pkg/FR-2020-06-23/pdf/2020-13438.pdf)
- Federal Register: https://www.federalregister.gov/documents/2020/06/23/2020-13438/airworthiness-directives-airbus-helicopters
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/35DA69EF5D2EBFE48625859000565256.0001
- Page: https://openairdocs.org/proposed/FAA-2020-0618

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for Airbus Helicopters Model AS-365N2, AS 365 N3, EC 155B, EC155B1, and SA-365N1 helicopters. This proposed AD would require inspecting the tail rotor gearbox (TGB) housing recess, and depending on the inspection results, performing more in-depth inspections and removing certain parts from service. The proposed AD would also prohibit installing a TGB unless it has passed certain inspections and has a new TGB control rod bearing installed. This proposed AD was prompted by the discovery of a foreign object obstructing the oil duct of a TGB control bearing. The actions of this proposed AD are intended to address an unsafe condition on these products.

## Notices in this docket

- Jun 23, 2020: Notice of proposed rulemaking (NPRM). (first notice), FR document 2020-13438, comments due Aug 7, 2020 (https://www.federalregister.gov/documents/2020/06/23/2020-13438/airworthiness-directives-airbus-helicopters)

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