# Airworthiness Directives; Eurocopter Deutschland GmbH (ECD) Model BO-105, BO-105A, BO-105C, BO-105S, and BO-105LS A-1 Helicopters
> **Rule** · Final rule. · Published 1996-04-17 · Effective 1996-05-22 · 61 FR 16703
## Document
- **Document number:** 96-9272
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 61 FR 16703
- **Publication date:** 1996-04-17
- **Effective date:** 1996-05-22
- **FAA docket:** Docket No. 95-SW-14-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to Eurocopter Deutschland GmbH (ECD) (Eurocopter) Model BO- 105, BO-105A, BO-105C, BO-105S, and BO-105LS A-1 helicopters, that requires a ground test and inspection of the tandem hydraulic switch- over system (switch-over system) for component wear and parts replacement, if necessary. This amendment is prompted by incidents involving Model BO-105 series helicopters in which, during the switch- over from Hydraulic System 1 to Hydraulic System 2, a 3-inch drop in the collective occurred, caused by component wear in the switch-over system. The actions specified by this AD are intended to detect switch- over system component wear, which could result in a sudden drop in the collective and a sudden loss of altitude.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1996/04/17/96-9272/airworthiness-directives-eurocopter-deutschland-gmbh-ecd-model-bo-105-bo-105a-bo-105c-bo-105s-and)
---
*AI Analytics · CC0 1.0*