# Airworthiness Directives; Eurocopter Deutschland GMBH Model BO-105CB-5 and BO-105CBS-5 Helicopters
> **Rule** · Final rule. · Published 2000-12-22 · Effective 2001-01-26 · 65 FR 80742
## Document
- **Document number:** 00-32552
- **Category:** airworthiness
- **Manufacturer:** Eurocopter Deutschland GMBH Model BO-105CB-5 and BO-105CBS-5
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 65 FR 80742
- **Publication date:** 2000-12-22
- **Effective date:** 2001-01-26
- **FAA docket:** Docket No. 99-SW-65-AD
## Abstract

This amendment supersedes an existing airworthiness directive (AD) that applies to Eurocopter Deutschland GMBH (ECD) Model BO-105CB-5 and BO-105CBS-5 helicopters. That AD currently requires, before further flight, creating a component log card or equivalent record and determining the calendar age and number of flights on each tension- torsion (TT) strap. This amendment requires before further flight, establishing a life limit for certain main rotor TT straps. This amendment is prompted by a need to establish a life limit for certain TT straps because of an accident in which a main rotor blade (blade) separated from an ECD Model MBB-BK 117 helicopter due to fatigue failure of a TT strap. The same part-numbered TT strap is used on the ECD Model BO-105 helicopters. The actions specified by this AD are intended to prevent fatigue failure of a TT strap, loss of a blade, and subsequent loss of control of the helicopter.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/12/22/00-32552/airworthiness-directives-eurocopter-deutschland-gmbh-model-bo-105cb-5-and-bo-105cbs-5-helicopters)
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