# Airworthiness Directives; Airbus Helicopters Deutschland GmbH (AHD) Helicopters
> **Rule** · Final rule. · Published 2021-06-01 · Effective 2021-07-06 · 86 FR 29183
## Document
- **Document number:** 2021-11392
- **Category:** airworthiness
- **Manufacturer:** Airbus
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 29183
- **Publication date:** 2021-06-01
- **Effective date:** 2021-07-06
- **FAA docket:** Docket No. FAA-2021-0126
## Abstract

The FAA is adopting a new airworthiness directive (AD) for Airbus Helicopters Deutschland GmbH (AHD) Model MBB-BK 117 D-2 helicopters. This AD was prompted by a report of a broken Titanium (Ti) bolt. This AD requires removing certain Ti-bolts from service and prohibits installing these Ti-bolts in a critical area. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/06/01/2021-11392/airworthiness-directives-airbus-helicopters-deutschland-gmbh-ahd-helicopters)
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