# Airworthiness Directives; Airbus Model A300, A310, and A300-600 Series Airplanes
> **Rule** · Final rule. · Published 1998-05-20 · Effective 1998-06-24 · 63 FR 27674
## Document
- **Document number:** 98-13292
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 63 FR 27674
- **Publication date:** 1998-05-20
- **Effective date:** 1998-06-24
- **FAA docket:** Docket No. 98-NM-13-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A300, A310, and A300-600 series airplanes, that requires replacement of the non-return valves located in the engine fuel feed lines on the outer fuel tank with new return valves; and, for certain airplanes, replacement of the inner tank booster pump canisters with modified canisters. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent sticking of non-return valves located in the fuel system, which could result in an internal fuel transfer from the center tank to the inner or outer tank. Such a transfer of fuel could lead to fuel spillage overboard through the vent system, and consequent insufficient fuel for the airplane to reach its flight destination.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/05/20/98-13292/airworthiness-directives-airbus-model-a300-a310-and-a300-600-series-airplanes)
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