# Airworthiness Directives; Airbus SAS Airplanes
> **Rule** · Final rule. · Published 2021-02-23 · Effective 2021-03-30 · 86 FR 10733
## Document
- **Document number:** 2021-03569
- **Category:** airworthiness
- **Manufacturer:** Airbus SAS
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 10733
- **Publication date:** 2021-02-23
- **Effective date:** 2021-03-30
- **FAA docket:** Docket No. FAA-2020-0900
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all Airbus SAS Model A318 series airplanes; Model A319-111, A319-112, A319- 113, A319-114, A319-115, A319-131, A319-132, A319-133, A319-151N, and A319-153N airplanes; Model A320 series airplanes; and Model A321 series airplanes. This AD was prompted by the results of laboratory tests on non-rechargeable lithium batteries installed in emergency locator transmitters (ELT), which highlighted a lack of protection against certain currents that could lead to thermal runaway and a battery fire. This AD requires modifying a certain ELT by installing a diode in the airplane circuit connecting the ELT battery, 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/2021/02/23/2021-03569/airworthiness-directives-airbus-sas-airplanes)
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