# Proposed AD FAA-2021-0184: Airbus SAS Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2021-12-18
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: March 22, 2021, 86 FR 15151
- Comments due: May 6, 2021
- Became: [AD 2021-12-18](https://openairdocs.org/ad/2021-12-18)
- Docket: FAA-2021-0184 (https://www.regulations.gov/docket/FAA-2021-0184, where comments are filed)
- Project: MCAI-2020-01599-T
- FR document: 2021-05395
- Official PDF: https://openairdocs.org/files/sha256/41/af/41af52449583d685146f9caf6f192ddc4da9db981375bff09723830de63097f9 (from https://www.govinfo.gov/content/pkg/FR-2021-03-22/pdf/2021-05395.pdf)
- Federal Register: https://www.federalregister.gov/documents/2021/03/22/2021-05395/airworthiness-directives-airbus-sas-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/080FBB500731342E862586A100503B8B.0001
- Page: https://openairdocs.org/proposed/FAA-2021-0184

## Summary

The FAA proposes to adopt a new airworthiness directive (AD) for all Airbus SAS Model A330-200, A330-200 Freighter, A330-300, A340- 200, and A340-300 series airplanes. This proposed AD was prompted by a report that the auxiliary power unit (APU) aft fuel pump printed circuit board (PCB) varnish had deteriorated; the varnish is one of the layers of protection against development of an ignition source. This proposed AD would require replacing each affected APU aft fuel pump, as specified in a European Union Aviation Safety Agency (EASA) AD, which is proposed for incorporation by reference. The FAA is proposing this AD to address the unsafe condition on these products.

## Notices in this docket

- Mar 22, 2021: Notice of proposed rulemaking (NPRM). (first notice), FR document 2021-05395, comments due May 6, 2021 (https://www.federalregister.gov/documents/2021/03/22/2021-05395/airworthiness-directives-airbus-sas-airplanes)

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