# Proposed AD FAA-2018-0704: Airbus SAS Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2019-06-03
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 3, 2018, 83 FR 38088
- Comments due: September 17, 2018
- Became: [AD 2019-06-03](https://openairdocs.org/ad/2019-06-03)
- Docket: FAA-2018-0704 (https://www.regulations.gov/docket/FAA-2018-0704, where comments are filed)
- FR document: 2018-16574
- Official PDF: https://openairdocs.org/files/sha256/7e/c2/7ec2db0033141d0da7efa348dec302efdff483cc676fa5a21134b3714e3dc00b (from https://www.govinfo.gov/content/pkg/FR-2018-08-03/pdf/2018-16574.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/08/03/2018-16574/airworthiness-directives-airbus-sas-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C094F90444B17C3F862582DE00519212.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0704

## Summary

We propose to adopt a new airworthiness directive (AD) for all Airbus SAS Model A330-200 Freighter, -200 and -300 series airplanes; and Airbus SAS Model A340-200, -300, -500, and -600 series airplanes. This proposed AD was prompted by reports of depressurization of hydraulic reservoirs caused by air leakage from the pressure relief valve (PRV) of the hydraulic reservoir (HR) due to the extrusion of the O-ring seal from certain HR PRVs. This proposed AD would require identifying the part number of the HR, and replacing and re-identifying affected HR PRVs. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Aug 3, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-16574, comments due Sep 17, 2018 (https://www.federalregister.gov/documents/2018/08/03/2018-16574/airworthiness-directives-airbus-sas-airplanes)

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