# Airworthiness Directives; Boeing Model 747 and 767 Series Airplanes Equipped With General Electric (GE) CF6-80C2 Engines
> **Rule** · Final rule; request for comments. · Published 1998-04-16 · Effective 1998-05-01 · 63 FR 18817
## Document
- **Document number:** 98-10054
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747 and 767 Series
- **Type:** Rule
- **Action:** Final rule; request for comments.
- **Citation:** 63 FR 18817
- **Publication date:** 1998-04-16
- **Effective date:** 1998-05-01
- **FAA docket:** Docket No. 98-NM-79-AD
## Abstract

This amendment supersedes an existing airworthiness directive (AD), applicable to certain Boeing Model 747 and 767 series airplanes, that currently requires revising the FAA-approved Airplane Flight Manual (AFM) to prohibit the use of certain fuels; and either replacing the existing placard on the door of the fueling control panel with a new placard, or replacing all dribble flow fuel nozzles (DFFN's) with standard fuel nozzles, which terminates the requirements for a placard and AFM revision. This amendment continues these requirements and adds additional airplanes to the applicability. This amendment is prompted by a report of an engine flameout due to the use of JP-4 or Jet B fuel during certification testing on an engine with DFFN's installed. The actions specified in this AD are intended to prevent such engine flameouts and consequent engine shutdown.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1998/04/16/98-10054/airworthiness-directives-boeing-model-747-and-767-series-airplanes-equipped-with-general-electric-ge)
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