# Proposed AD FAA-2005-20500: Airbus Model A320 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2005-15-02
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 8, 2005, 70 FR 11170
- Comments due: April 7, 2005
- Became: [AD 2005-15-02](https://openairdocs.org/ad/2005-15-02)
- Docket: FAA-2005-20500 (https://www.regulations.gov/docket/FAA-2005-20500, where comments are filed)
- Project: 2004-NM-235-AD
- FR document: 05-4408
- Official PDF: https://openairdocs.org/files/sha256/5c/0e/5c0ea68837ba9ea06ef88c5a2b365fd056a1f78771441771f324ee598e5b4ae0 (from https://www.govinfo.gov/content/pkg/FR-2005-03-08/pdf/05-4408.pdf)
- Federal Register: https://www.federalregister.gov/documents/2005/03/08/05-4408/airworthiness-directives-airbus-model-a320-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6195CB847085AAC186256FBE005CC7C2.0001
- Page: https://openairdocs.org/proposed/FAA-2005-20500

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for certain Airbus Model A320 series airplanes. This proposed AD would require 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 proposed 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 proposing 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.

## Notices in this docket

- Mar 8, 2005: Notice of proposed rulemaking (NPRM). (first notice), FR document 05-4408, comments due Apr 7, 2005 (https://www.federalregister.gov/documents/2005/03/08/05-4408/airworthiness-directives-airbus-model-a320-series-airplanes)

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