# Proposed AD FAA-2018-0505: Airbus Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2018-19-19
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: June 11, 2018, 83 FR 26880
- Comments due: July 26, 2018
- Became: [AD 2018-19-19](https://openairdocs.org/ad/2018-19-19)
- Docket: FAA-2018-0505 (https://www.regulations.gov/docket/FAA-2018-0505, where comments are filed)
- FR document: 2018-12230
- Official PDF: https://openairdocs.org/files/sha256/bc/46/bc46cc7c18c3878d9d7f090d3098e62421cdaee8114978a9cc96c9aea7241ebf (from https://www.govinfo.gov/content/pkg/FR-2018-06-11/pdf/2018-12230.pdf)
- Federal Register: https://www.federalregister.gov/documents/2018/06/11/2018-12230/airworthiness-directives-airbus-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8C82228C91C45E26862582A9004D3291.0001
- Page: https://openairdocs.org/proposed/FAA-2018-0505

## Summary

We propose to adopt a new airworthiness directive (AD) for all Airbus Model A350-941 airplanes. This proposed AD was prompted by a report of an overheat failure mode of the hydraulic engine-driven pump, which could cause a fast temperature rise of the hydraulic fluid. This proposed AD would require modifying the hydraulic monitoring and control application (HMCA) software. We are proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Jun 11, 2018: Notice of proposed rulemaking (NPRM). (first notice), FR document 2018-12230, comments due Jul 26, 2018 (https://www.federalregister.gov/documents/2018/06/11/2018-12230/airworthiness-directives-airbus-airplanes)

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