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HAWK21M
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Grd Fire Extinguisher For 4 Engined Aircraft

Sat Oct 11, 2003 8:15 pm

What would be the capacity of a Ground Fire Extinguisher bottle used for Engine Start on a B747 or similiar 4 engined Aircraft during Engine start.
regds
HAWK.
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Spitfire
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 1:14 am

None...there isn't anymore a fire extinguisher on stand by near the plane during the engine start, as, generaly, the start occurs after- or during - a more or less long push back.

Rgds

Spitfire
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cancidas
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 1:27 am

aircraft engines are no longer started at the gate. if you listen to ground communications at large airports you will hear pilots asking ground for permision to push, that is pushback from the gate and permission to start, asking to start engines after they have been pushed back or during thier pushback.
"...cannot the kingdom of salvation take me home."
 
cdfmxtech
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 1:37 am

There are instances that engiens have to be started at the gate (gnd maintenance) or an inop APU, this requireing a ground start cart.
 
dc10hound
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 5:03 am

There are instances that engiens have to be started at the gate (gnd maintenance) or an inop APU, this requireing a ground start cart.

And when that is required the following procedures are to be followed:

"Whenever aircraft engines are being started during maintenance operations, one dry chemical extinguisher (at least 18 lb. size) should be immediately available. At regular gate positions, this requirement is met by the dry chemical wheeled units. At other locations, the extinguisher may be mounted on a servicing vehicle at the aircraft, at a fixed position within 100 feet of the aircraft, or a portable unit may be brought to the aircraft."
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cptkrell
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 5:48 am

Cancidas wrote: "aircraft are no longer started at the gate." Actually, they are often started at the gate and backed out using the thrust reversers....jack
all best; jack
 
Spitfire
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 6:55 am

"..Actually, they are often started at the gate and backed out using the thrust reversers....".

Sorry Jack, not autorized for Boeing 737,747,757,767,777, DC10, MD11, Airbus A320, 330, 340,...

Only for tail mounted engines a/c.

Rgds

Spitfire
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cptkrell
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Sun Oct 12, 2003 10:42 pm

Sorry, Spitfire, I should have been more specific. Sitting in the lounge and watching about a half-dozen DC9s and sisters back themselves up one after the other always sticks in my mind...jack
all best; jack
 
Spitfire
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RE: Grd Fire Extinguisher For 4 Engined Aircraft

Mon Oct 13, 2003 12:12 am

Hi Jack,

The problem come from the jet blast from "wing mounted engines" in case of reverse at very low speed (that's the case here)...you can have gravel, dust (or anything you can find on a tarmac) ingestion into the engines. That's not so good for those costly high precision mechanical stuff.  Sad
And moreover, to backup an a/c using reverse you can't use "idle reverse" only, you have to put some power initially...

Rgds

Spitfire
Sabena ... Never to be forgotten (12 years already , what a shame !! )
 
cancidas
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Joined: Thu Jul 03, 2003 7:34 am

RE: Grd Fire Extinguisher For 4 Engined Aircraft

Mon Oct 13, 2003 12:27 am

a/c with tail mounted engines are the only ones i have seen doing powerbacks. anything else will not do them [as they are not allowed] and will start after pushback. don't forget, you have a lot of FOD that can be ingested into the engines at gates.
"...cannot the kingdom of salvation take me home."
 
wilcharl
Posts: 1151
Joined: Sun Jun 25, 2000 11:19 am

RE: Grd Fire Extinguisher For 4 Engined Aircraft

Mon Oct 13, 2003 11:23 am

Sorry to both you guys... (Spitfire and Jack) but 757s were routinly powered back by Eastern, AA did it for a minute also... Air Florida and Frontier (1) even did it with the 732 ...

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