# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2020-09-03 · Effective 2020-10-08 · 85 FR 54891
## Document
- **Document number:** 2020-19402
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 54891
- **Publication date:** 2020-09-03
- **Effective date:** 2020-10-08
- **FAA docket:** Docket No. FAA-2020-0338
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Airbus SAS Model A350-941 and -1041 airplanes. This AD was prompted by the results of laboratory tests on non-rechargeable lithium batteries installed in certain emergency locator transmitters (ELTs), which highlighted a lack of protection against current injections of 28 volts direct current (DC) or 115 volts alternating current (AC) that could lead to thermal runaway and a battery fire. This AD requires modifying a certain ELT by installing a diode between the ELT and the terminal block, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/09/03/2020-19402/airworthiness-directives-airbus-sas-airplanes)
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