# Airworthiness Directives; Boeing Model 747-400, -400D, -400F; 767-200, -300, -300F; and 777-200 and -300 Series Airplanes
> **Rule** · Final rule. · Published 2005-06-24 · Effective 2005-07-29 · 70 FR 36474
## Document
- **Document number:** 05-12311
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 70 FR 36474
- **Publication date:** 2005-06-24
- **Effective date:** 2005-07-29
- **FAA docket:** Docket No. FAA-2004-18784
## Abstract

The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-400, -400D, -400F; 767-200, -300, -300F; and 777-200 and -300 series airplanes. This AD requires installing a jumper wire between the wiring of the fire extinguisher switch and the fuel shutoff switch for each engine, and other specified actions. This AD is prompted by a certain combination of conditions, which could cause the fuel spar shutoff valves to remain partially open. We are issuing this AD to prevent a latent open circuit that could leave the fuel spar shutoff valve in a partially open position when the engine fire switch is activated, which could result in fuel from the engine feeding an uncontrolled fire in the engine or the strut.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2005/06/24/05-12311/airworthiness-directives-boeing-model-747-400--400d--400f-767-200--300--300f-and-777-200-and--300)
---
*AI Analytics · CC0 1.0*