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Airbus A300 Aborted Takeoff.  
User currently offlineCapterdi From Mexico, joined Oct 2003, 15 posts, RR: 0
Posted (7 years 10 months 4 weeks 6 hours ago) and read 3018 times:
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A friend told me what happened to him in his most recent trip. He is a frequent traveler and also likes planes and all related issues.
The plane was already lined up for takeoff, the pilot went to full throttle, previous to releasing the brakes and starting to roll down the runway, but then suddenly the engines went to idle again. Next, the pilot announced to the passengers that they were not having enough thrust for takeoff, but this was only to be a small delay. So they pulled the plane apart , in order to free the runway for the waiting airplanes. My friend had an aisle seat, and it was dark outside, so he could not see exactly what operations went on. But he says that a maintenance truck or some sort of truck came close to the airplane, that by the way never shut the engines down. He tells me that a hose was connected, he is not sure if to a wing or to an engine. Then he could hear the engines coming up to life again, but also he could notice a strange noise: as if one of the engines could not rev up fully, a sound began to increase pitch and then decrease pitch, increase, decrease, etc. until suddenly the engine sort of got rid of something, and so could go to full revs and sustain them. Then the hose was disconnected, the truck went away, and in a matter of minutes the plane took off.

What was possible wrong? What activities did the floor personnel perform in order to correct the problem?

13 replies: All unread, jump to last
 
User currently offlineStarlionblue From Greenland, joined Feb 2004, 16908 posts, RR: 67
Reply 1, posted (7 years 10 months 4 weeks 5 hours ago) and read 2997 times:

Your description makes it sound like a ground start car was connected to start up one of the engines. Why this happened i have no idea.


"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineCapterdi From Mexico, joined Oct 2003, 15 posts, RR: 0
Reply 2, posted (7 years 10 months 4 weeks 5 hours ago) and read 2976 times:
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Starlionblue,

Thank you for your comment. Sounds reasonable. But then, if the plane seemed to be ready for takeoff, can it be that one of the engines suddenly died, and the crew could not restart it from the cockpit?


User currently offlineKnoxibus From France, joined Aug 2007, 251 posts, RR: 23
Reply 3, posted (7 years 10 months 4 weeks 4 hours ago) and read 2957 times:
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I remember that when I was working on the ramp in RUN, one 747 from AF had to have one of its engine started while the three others were running (basically prior to taxiing) because of a special valve that had to be manually opened through a rod, by plugging it to the pylon.

So one of our crew took one of those flat bed trucks with telescopic capabilities (like the one used to remove seat rows) and while being connected to the service interphone with the cockpit, he was basically starting the engine all by himself.

I think the starter was dead and we needed bleed (pneumatic) from the other engines or the APU to get it started.



No matter what anybody tells you, words and ideas can change the world.
User currently offline113312 From United States of America, joined Apr 2005, 564 posts, RR: 1
Reply 4, posted (7 years 10 months 4 weeks 4 hours ago) and read 2949 times:

Could have been a stuck surge bleed valve.

User currently offlineMatt72033 From United Kingdom, joined May 2005, 1617 posts, RR: 4
Reply 5, posted (7 years 10 months 4 weeks 3 hours ago) and read 2915 times:

Quoting Knoxibus (Reply 3):
I remember that when I was working on the ramp in RUN, one 747 from AF had to have one of its engine started while the three others were running (basically prior to taxiing) because of a special valve that had to be manually opened through a rod, by plugging it to the pylon.

the usual problem is a dodgy start valve, wont let air to the starter! but you stick a handle in the base of the engine to open that, not the pylon!

Quoting Starlionblue (Reply 1):
Your description makes it sound like a ground start car was connected to start up one of the engines. Why this happened i have no idea.

as for the original post, you wouldnt need an airstart if the engines were already running! even if only one engine was running you can cross bleed to start the other, no need for an airstart.....all seems a bit strange to me

Quoting Capterdi (Reply 2):
Thank you for your comment. Sounds reasonable. But then, if the plane seemed to be ready for takeoff, can it be that one of the engines suddenly died, and the crew could not restart it from the cockpit?

if it died and couldnt be restarted from the flight deck.....which it should be able to.......i dont think id be to inclined to just get it started again and be on my way! how do you know it wont happen again!

all seems a bit strange!


User currently offlineCapterdi From Mexico, joined Oct 2003, 15 posts, RR: 0
Reply 6, posted (7 years 10 months 4 weeks 3 hours ago) and read 2905 times:
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Matt72033,

This happened at Mexico City airport....


User currently offlineMatt72033 From United Kingdom, joined May 2005, 1617 posts, RR: 4
Reply 7, posted (7 years 10 months 4 weeks 3 hours ago) and read 2904 times:

Quoting Capterdi (Reply 6):
This happened at Mexico City airport....

that shouldnt reaaaly matter!


User currently offlineFr8mech From United States of America, joined Sep 2005, 5092 posts, RR: 12
Reply 8, posted (7 years 10 months 4 weeks 2 hours ago) and read 2894 times:

Quoting Knoxibus (Reply 3):
So one of our crew took one of those flat bed trucks with telescopic capabilities (like the one used to remove seat rows) and while being connected to the service interphone with the cockpit, he was basically starting the engine all by himself.

That would be a pylon valve failure. The tech didn't start the engine by himself. The flight crew started it after the pylon valve was opened by the tech.



When seconds count...the police are minutes away. Never leave your cave without your club.
User currently onlineAR385 From Mexico, joined Nov 2003, 5940 posts, RR: 30
Reply 9, posted (7 years 10 months 4 weeks 1 hour ago) and read 2859 times:
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What airline aside form AA uses an A-300 at MEX?


MGGS
User currently offlineCapterdi From Mexico, joined Oct 2003, 15 posts, RR: 0
Reply 10, posted (7 years 10 months 3 weeks 6 days 16 hours ago) and read 2721 times:
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I know Mexicana uses A-318/319/320.

User currently onlineAR385 From Mexico, joined Nov 2003, 5940 posts, RR: 30
Reply 11, posted (7 years 10 months 3 weeks 6 days 13 hours ago) and read 2682 times:
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Quoting Capterdi (Reply 10):
I know Mexicana uses A-318/319/320.

I now but the thread starter specifically mention an A-300



MGGS
User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3695 posts, RR: 35
Reply 12, posted (7 years 10 months 3 weeks 6 days 13 hours ago) and read 2676 times:
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Quoting Matt72033 (Reply 5):
the usual problem is a dodgy start valve, wont let air to the starter! but you stick a handle in the base of the engine to open that, not the pylon!

The Bleed vlv (or Pylon Vlv in 747 parlance) may have to have been manually opened.

The whole incicdent is difficult to diagnose from the info given in the thread starter


User currently offlineCelticmanx From Netherlands, joined Mar 2001, 99 posts, RR: 0
Reply 13, posted (7 years 10 months 2 weeks 1 day 4 hours ago) and read 2267 times:

Quoting AR385 (Reply 9):
What airline aside form AA uses an A-300 at MEX?

Aero Union

A300-B4

But they are a Cargo company so it does not apply to this case.

Manx


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