# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2020-10-06 · Effective 2020-11-10 · 85 FR 62993
## Document
- **Document number:** 2020-21997
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 62993
- **Publication date:** 2020-10-06
- **Effective date:** 2020-11-10
- **FAA docket:** Docket No. FAA-2016-6141
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes. This AD was prompted by the FAA's analysis of the Model 767 fuel system reviews conducted by the manufacturer. This AD requires modifying the fuel quantity indicating system (FQIS) to prevent development of an ignition source inside the center fuel tank due to electrical fault conditions. This AD also provides optional actions for cargo airplanes. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/10/06/2020-21997/airworthiness-directives-the-boeing-company-airplanes)
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