B737 APU automatic fire discharge ?
Thread Starter
Joined: May 2003
Posts: 11
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From: eu
B737 APU automatic fire discharge ?
Let's say:
that the pilots have left the aircraft with the APU running and no ground crew is around and the APU catches fire.
The APU will automatically shut down BUT is there an automatic fire extinguisher discharge feature as well?
I believe that I have seen that described some place but I cannot find it in my current AOM.
bbj
that the pilots have left the aircraft with the APU running and no ground crew is around and the APU catches fire.
The APU will automatically shut down BUT is there an automatic fire extinguisher discharge feature as well?
I believe that I have seen that described some place but I cannot find it in my current AOM.
bbj
Joined: Apr 2002
Posts: 386
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From: UK
Ehm, i don't think that holds true do.
I've just read some things from the computer based training 737 NG and they don't state an automatic discharge function.
It does auto shutdown as you correctly mentioned, but to my knowledge it will NOT auto discharge the one fire bottle the APU has got.
I've just read some things from the computer based training 737 NG and they don't state an automatic discharge function.
It does auto shutdown as you correctly mentioned, but to my knowledge it will NOT auto discharge the one fire bottle the APU has got.
Joined: Feb 2000
Posts: 48
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From: Ireland
In my experience on the 73 the crew would never leave the aircraft with the APU running with no one qualified to take over. If there was a delay in change over and they had to move on (go home or change aircraft) a full shut down was required.
Joined: Jul 2002
Posts: 368
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From: brisbane, Australia
quote..Just to remember, we could keep a maintenance person outside the aircraft, since there is an APU shutdown/fire extinguisher device in the main wheel well.
"yep and some are hooked up and tested".
"yep and some are hooked up and tested".
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Posts: n/a
"I've just read some things from the computer based training 737 NG and they don't state an automatic discharge function."
Generally, just be aware that with automatic discharge on some aircraft types, it may be airplane specific. In our 747-400 fleet there is one aircraft which does not have this function, the rest do. I would advise asking the advice of your engineering technical specialists if you have any doubts.
Also be aware that a particular auto-extinguishing system may be operative on the ground, but not in the air.
Regards.
Q.
Generally, just be aware that with automatic discharge on some aircraft types, it may be airplane specific. In our 747-400 fleet there is one aircraft which does not have this function, the rest do. I would advise asking the advice of your engineering technical specialists if you have any doubts.
Also be aware that a particular auto-extinguishing system may be operative on the ground, but not in the air.
Regards.
Q.
Joined: Feb 2003
Posts: 49
Likes: 0
From: Kuala Lumpur
Hi all,
Where I'm flying, the B737s have APUs from two different manufacturers. Initially we were using the GTCP85s, then changed to APS2000s, then 3 yers back we changed back to the GTCP85s. I do not recall the APS2000s having the auto discharge function. The GTCP85 is definitely fully manual except for the auto shutdown function for low oil pressure, fault, overspeed and fire. No auto discharge...
Rgds...
Where I'm flying, the B737s have APUs from two different manufacturers. Initially we were using the GTCP85s, then changed to APS2000s, then 3 yers back we changed back to the GTCP85s. I do not recall the APS2000s having the auto discharge function. The GTCP85 is definitely fully manual except for the auto shutdown function for low oil pressure, fault, overspeed and fire. No auto discharge...
Rgds...
