# Airworthiness Directives; Airbus Model A340-541 and -642 Airplanes
> **Rule** · Final rule; request for comments. · Published 2006-09-06 · Effective 2006-09-21 · 71 FR 52410
## Document
- **Document number:** E6-14624
- **Category:** airworthiness
- **Manufacturer:** Airbus Model A340-541 and -642
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 71 FR 52410
- **Publication date:** 2006-09-06
- **Effective date:** 2006-09-21
- **FAA docket:** Docket No. FAA-2006-25722
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Airbus Model A340-541 and -642 airplanes. This AD requires a one-time inspection of the anti-stall valve sleeve of the ram air turbine (RAT) for proper installation, determining the part number of the modification plate on the hydraulic pump of the RAT, and follow-on corrective actions if necessary. This AD results from reports of failure of the anti-stall valve on the hydraulic pump of the RAT during scheduled ground tests. We are issuing this AD to prevent failure of the RAT hydraulic pump to supply adequate pressure to activate the RAT, and consequent loss of the RAT as a source of hydraulic and electrical power in an emergency situation.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2006/09/06/E6-14624/airworthiness-directives-airbus-model-a340-541-and--642-airplanes)
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