# Airworthiness Directives; Boeing Model 747-400 Series Airplanes Powered by General Electric CF6-80C2 or Pratt & Whitney PW4000 Series Engines
> **Rule** · Final rule. · Published 1996-04-23 · Effective 1996-05-23 · 61 FR 17824
## Document
- **Document number:** 96-9338
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747-400 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 61 FR 17824
- **Publication date:** 1996-04-23
- **Effective date:** 1996-05-23
- **FAA docket:** Docket No. 95-NM-98-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 series airplanes, that requires modification of the engine fuel feed system. This amendment is prompted by reports indicating that the coupling nut on the fuel tube on the outboard strut (engine position 1) fractured. The actions specified by this AD are intended to prevent such fracturing of the coupling nut, which could result in release of fuel onto the engine cowling and a subsequent fire.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1996/04/23/96-9338/airworthiness-directives-boeing-model-747-400-series-airplanes-powered-by-general-electric-cf6-80c2)
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