# Airworthiness Directives; Airbus Model A320-111 Airplanes and Model A320-200 Series Airplanes
> **Rule** · Final rule. · Published 2005-07-21 · Effective 2005-08-25 · 70 FR 41946
## Document
- **Document number:** 05-14087
- **Category:** airworthiness
- **Manufacturer:** Airbus Model A320-111
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 41946
- **Publication date:** 2005-07-21
- **Effective date:** 2005-08-25
- **FAA docket:** Docket No. FAA-2005-20500
## Abstract

The FAA is adopting a new airworthiness directive (AD) that applies to certain Airbus Model A320-111 airplanes and Model A320-200 series airplanes. This AD requires post-maintenance bleeding of accumulated air from, or ground functional testing of, the ram air turbine (RAT) system; modifying and reidentifying the airborne ground check module of the RAT system; and replacing the RAT reducer assembly if applicable. This AD is prompted by reports of unsuccessful in-flight RAT tests during which a deployed RAT failed to pressurize the blue hydraulic circuit of the RAT system. We are issuing this AD to prevent failure of the RAT during an in-flight emergency, which could lead to loss of hydraulic and electrical power and reduced controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/07/21/05-14087/airworthiness-directives-airbus-model-a320-111-airplanes-and-model-a320-200-series-airplanes)
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