From: email@example.com (Paul Kearney) Organization: Ireland On-Line Date: 07 Sep 96 17:09:05 References: 1 Followups: 1
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Erico Oller Westerberg <firstname.lastname@example.org> wrote: : Re: Engine fire extinguishers...do they exist? YES : Could anyone tell me if there are any fire extinguishers mounted : inside or close to the engines in modern airliners? Depends on the aircraft in question. Some have the 'bottles' near the engine or some have the 'bottles' in the wing roots or cargo-area-walls. For example the Boeing 737 has 2 main bottles located in the main Wheel Well(s) which have pipes running out to both engines. The APU at the rear has ( i think ) 2 bottles which are smaller than the other main ones. The same with the older 747's, they're in the cargo area. On some rear-engined aircraft the bottles are in the rear of the tail cone or in the mount-fairing that is between the fuselage and the engine. : If there are : any - how do they work? The Bottle has a diaphram at its neck which holds the pressurised gas in it. When the pilot or ground engineer triggers a bottle he/she literlally blows this diaphram apart using a small squib and the gas runs along the pipes ( which are automatically selected by the firing process) and around the engine to hopefully suffocate the fire. If it doesnt go out on the first trigger, you normally have one more go but when you have a fire in an engine its time to find an airport fast ! :Any special gas, different to those used : in regular fire extinguishers? I gather that CFCs are used. Halon is I think one that is used which is also used in the common or garden variety of extinguishers. Recycling machines are on the market when these bottles are being serviced. One that I Know of is known as HAL and is available worldwide - Designed in Ireland and Patented Worldwide.