# Airworthiness Directives; Airbus Helicopters
> **Rule** · Final rule. · Published 2020-11-09 · Effective 2020-12-14 · 85 FR 71235
## Document
- **Document number:** 2020-24675
- **Category:** airworthiness
- **Manufacturer:** Airbus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 71235
- **Publication date:** 2020-11-09
- **Effective date:** 2020-12-14
- **FAA docket:** Docket No. FAA-2020-0378
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Model AS350B, AS350B1, AS350B2, AS350B3, AS350BA, AS350D, AS350D1, AS355E, AS355F, AS355F1, AS355F2, AS355N, AS355NP, EC130B4, and EC130T2 helicopters. This AD requires visually inspecting each main rotor gearbox (MGB) suspension bar attachment bracket bolt for missing bolt heads. Depending on the outcome of the visual inspection, measuring the tightening torque, removing certain parts, sending photos and reporting information to Airbus Helicopters, and completing an FAA-approved repair is required. This AD was prompted by a report of a missing MGB suspension bar attachment bolt head. The actions of this AD are intended to address an unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/11/09/2020-24675/airworthiness-directives-airbus-helicopters)
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