# Proposed AD FAA-2015-4816: Airbus Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2016-06-13
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: November 19, 2015, 80 FR 72401
- Comments due: January 4, 2016
- Became: [AD 2016-06-13](https://openairdocs.org/ad/2016-06-13)
- Docket: FAA-2015-4816 (https://www.regulations.gov/docket/FAA-2015-4816, where comments are filed)
- Project: 2014-NM-238-AD
- FR document: 2015-29444
- Official PDF: https://openairdocs.org/files/sha256/fd/5f/fd5fae5e787b2e9eaffd56c1168ac91bc44831f118c54ec133ebb320ea976559 (from https://www.govinfo.gov/content/pkg/FR-2015-11-19/pdf/2015-29444.pdf)
- Federal Register: https://www.federalregister.gov/documents/2015/11/19/2015-29444/airworthiness-directives-airbus-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1E6725D8748C0DDF86257F020052A6A6.0001
- Page: https://openairdocs.org/proposed/FAA-2015-4816

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A319, A320, and A321 series airplanes. This proposed AD was prompted by investigations that revealed that the cover seal of the brake dual distribution valve (BDDV) was damaged and did not ensure efficient sealing. This proposed AD would require modifying the BDDV having certain part numbers; modifying the drain hose of the BDDV; checking for the presence of water, ice, and hydraulic fluid; and re-identifying the BDDV; and related investigative and corrective actions if necessary. We are proposing this AD to prevent damage to the BDDV, which could lead to water ingestion in the BDDV and freezing of the BDDV in flight, possibly resulting in loss of braking system function after landing.

## Notices in this docket

- Nov 19, 2015: Notice of proposed rulemaking (NPRM). (first notice), FR document 2015-29444, comments due Jan 4, 2016 (https://www.federalregister.gov/documents/2015/11/19/2015-29444/airworthiness-directives-airbus-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.