# Proposed AD 95-SW-14-AD: Eurocopter Deutschland GmbH (ECD) Model BO-105, BO-105A, BO-105C, BO-105S, BO-105LS A-1 Helicopters

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 96-08-04
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 2, 1995, 60 FR 55680
- Comments due: January 2, 1996
- Became: [AD 96-08-04](https://openairdocs.org/ad/96-08-04)
- Docket: 95-SW-14-AD
- FR document: 95-27202
- Official PDF: https://openairdocs.org/files/sha256/75/9f/759fb593bb09b50822575931aa96aed082c86019fb7b18df3d708b01d5a3c4dc (from https://www.govinfo.gov/content/pkg/FR-1995-11-02/pdf/95-27202.pdf)
- Federal Register: https://www.federalregister.gov/documents/1995/11/02/95-27202/airworthiness-directives-eurocopter-deutschland-gmbh-ecd-model-bo-105-bo-105a-bo-105c-bo-105s
- Page: https://openairdocs.org/proposed/95-SW-14-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to Eurocopter Deutschland GmbH (ECD) (Eurocopter) Model BO-105, BO-105A, BO-105C, BO-105S, BO-105LS A-1 helicopters. This proposal would require a ground test and inspection of the tandem hydraulic switch-over system (switch-over system) for component wear and parts replacement, if necessary. This proposal 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 the proposed 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.

## Notices in this docket

- Nov 2, 1995: Notice of proposed rulemaking (NPRM). (first notice), FR document 95-27202, comments due Jan 2, 1996 (https://www.federalregister.gov/documents/1995/11/02/95-27202/airworthiness-directives-eurocopter-deutschland-gmbh-ecd-model-bo-105-bo-105a-bo-105c-bo-105s)

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