# Proposed AD 99-NE-24-AD: General Electric Company CF6-80C2 Series Turbofan Engines

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2000-04-14
- Action: Notice of proposed rulemaking (NPRM).
- Published: September 8, 1999, 64 FR 48721
- Comments due: November 8, 1999
- Became: [AD 2000-04-14](https://openairdocs.org/ad/2000-04-14)
- Docket: 99-NE-24-AD
- FR document: 99-23254
- Official PDF: https://openairdocs.org/files/sha256/96/c0/96c0f205ab0fb5c8a010de461477e3d4f42b2f5ced4c4f6616f72f13a9afda1d (from https://www.govinfo.gov/content/pkg/FR-1999-09-08/pdf/99-23254.pdf)
- Federal Register: https://www.federalregister.gov/documents/1999/09/08/99-23254/airworthiness-directives-general-electric-company-cf6-80c2-series-turbofan-engines
- Page: https://openairdocs.org/proposed/99-NE-24-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to General Electric Company (GE) CF6- 80C2 series turbofan engines. This proposal would require replacement of the fuel tube connecting the flowmeter to the Integrated Drive Generator (IDG) and the fuel tube(s) connecting the Main Engine Control (MEC) or Hydromechanical (HMU) to the flowmeter with improved fuel tubes. This proposal is prompted by reports of fuel leaking in the core cowl cavity under high pressure that can be ignited by the hot engine case temperatures. The actions specified by the proposed AD are intended to prevent high-pressure fuel leaks caused by improper seating of fuel tube flanges, which could result in an engine fire and damage to the airplane.

## Notices in this docket

- Sep 8, 1999: Notice of proposed rulemaking (NPRM). (first notice), FR document 99-23254, comments due Nov 8, 1999 (https://www.federalregister.gov/documents/1999/09/08/99-23254/airworthiness-directives-general-electric-company-cf6-80c2-series-turbofan-engines)

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