737NG. Waiting 30s after rotating fire warning switch
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737NG. Waiting 30s after rotating fire warning switch
Hello!
Been thinking about a fire issue on the 737NG (maybe the classic as well but I wouldn't know
). If having an eng fire you time 30s after discharging the first bottle. Know why is that? There are total of 2 bottles for both engines. Why not discharge 2 bottles in the same eng immediately thus increasing the chances of putting out the fire. I mean you do this on the ground, right?
Cheers,
Olof
Been thinking about a fire issue on the 737NG (maybe the classic as well but I wouldn't know
). If having an eng fire you time 30s after discharging the first bottle. Know why is that? There are total of 2 bottles for both engines. Why not discharge 2 bottles in the same eng immediately thus increasing the chances of putting out the fire. I mean you do this on the ground, right?Cheers,
Olof
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The argument is that you would be reducing your chances.
Pulling the fire handle should stop the fire. Firing the first bottle should stop the fire. firing the second bottle should stop the fire. 3 chances.
Blowing your load at once. 1 chance.
On the ground a really big second chance in red wagons is on its way.
The manufactorer tests these things and hopefully you never will, it is best to leave things to people who know, understand and designed the system. The Capt is entirely at liberty to deviate from procedures but may have to argue the case in court if things didnt turn out as intended.
Pulling the fire handle should stop the fire. Firing the first bottle should stop the fire. firing the second bottle should stop the fire. 3 chances.
Blowing your load at once. 1 chance.
On the ground a really big second chance in red wagons is on its way.
The manufactorer tests these things and hopefully you never will, it is best to leave things to people who know, understand and designed the system. The Capt is entirely at liberty to deviate from procedures but may have to argue the case in court if things didnt turn out as intended.
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I hear what you saying and by all means, I will stick to the procedure. My argument is that firing 2 bottles at the same time would increase chance no. 3 rather than decreasing it....after all, 2 are better than one, right? Does anyone know why boeing wants us to wait 30 sec?
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Everything takes time. 5 -10 lbs of halon to flood the compartment. Fire to stop. Fire detector to return to normal.
Do something more useful like planning or commencing your next move.
Do something more useful like planning or commencing your next move.
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Just guessing here but fire detectors don't measure fire directly but temperature.
It may take some time for the fire wires to cool down sufficiently before the warning goes away.
I am sure Boeing will have done the appropriate testing.
It may take some time for the fire wires to cool down sufficiently before the warning goes away.
I am sure Boeing will have done the appropriate testing.
