# Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
> **Rule** · Final rule. · Published 2021-02-22 · Effective 2021-03-29 · 86 FR 10449
## Document
- **Document number:** 2021-01848
- **Category:** airworthiness
- **Manufacturer:** Airbus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 10449
- **Publication date:** 2021-02-22
- **Effective date:** 2021-03-29
- **FAA docket:** Docket No. FAA-2020-1037
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters. This AD requires removing certain Titanium (Ti) bolts from service and prohibits installing these Ti-bolts in a critical area. This AD was prompted by a report of a broken Ti-bolt. The actions of this AD are intended to address an unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/02/22/2021-01848/airworthiness-directives-airbus-helicopters-deutschland-gmbh-helicopters)
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