ubeema
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How Dangerous Fuel Dumping Is For Area Population

Mon Oct 07, 2013 10:43 pm

I live in the DFW area and the KL032 engine incident after takeoff on Sunday made me curious as my wife was asking me and I could not answer. Although it is an emergency procedure, are there known negative effects to the population and the environment in the area surrounding the flight path due to fuel dumping? Send me a link to the thread if this was answered before on a.net.

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oly720man
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RE: How Dangerous Fuel Dumping Is For Area Population

Mon Oct 07, 2013 10:51 pm

It's possible that there may be some environmental issues, but less likely to be any individual "human" problems.

http://www.southernstudies.org/2010/...amage-some-blamed-on-bp-spill.html

The hope is that fuel will evaporate and disperse before hitting the ground as an aerosol, but weather conditions will contribute to how well, or not, the fuel evaporates.
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PlymSpotter
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RE: How Dangerous Fuel Dumping Is For Area Population

Mon Oct 07, 2013 10:56 pm

The biggest danger is flying back through your/others own dumped fuel vapor, hence why the dump area is remote and non overlapping circuits are flown.


Dan  
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AR385
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RE: How Dangerous Fuel Dumping Is For Area Population

Mon Oct 07, 2013 10:59 pm

Environmentally/to humans I think there are no issues. Unless it´s a catastrophic emergency the plane will get to an altitude that will ensure the fuel is dissolved or dispersed when leaving the tanks. In the case of the flight you mention, they actually climbed to a higher altitude to dump fuel.
 
pwm2txlhopper
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RE: How Dangerous Fuel Dumping Is For Area Population

Mon Oct 07, 2013 11:02 pm

I'd say virtually none. The fuel dissipates before it ever hits the ground.

Go out in the car on the interstate. Get up to about 80MPH and throw a cup of water out the window. If you watch, it essentially breaks apart into a spray that barley wets the ground. Now imagine flying at several thousand feet at 200+ knots and ejecting fluid into the air. it's going to dissipate into a fine mist instantly. Any trace amounts of almost vaporized fuel is simply going to evaporate before it ever hits ground.
 
freakyrat
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RE: How Dangerous Fuel Dumping Is For Area Population

Mon Oct 07, 2013 11:17 pm

The plane left a nice fuel vapor trail though. The neatest one that I saw was when I lived in Conroe and a Continental B727-200 leaving IAH developed a hydraulic leak and had to return immediately back to IAH. It flew right over our subdivision at about 1,500 feet maybe lower and since it was close to sunset the fuel lit up behind the plane and looked pretty spectacular.

Last summer I was flying to AMS on United's daily flight out of IAH when we encountered a problem with the Captain's PFD and had to divert to EWR. We started dumping fuel but had to turn east south of the Washington SFRA. I don't think they wanted anyone dumping fuel over DC unless it was an absolute emergency.
 
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Starlionblue
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RE: How Dangerous Fuel Dumping Is For Area Population

Tue Oct 08, 2013 1:48 am

Apart from the aforementioned dispersal, fuel dumping incidents are quite rare. You are extremely unlikely to be on the ground under a fuel dump even once.
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo
 
winstonlegthigh
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RE: How Dangerous Fuel Dumping Is For Area Population

Tue Oct 08, 2013 5:09 pm

Quoting PlymSpotter (Reply 2):

The biggest danger is flying back through your/others own dumped fuel vapor, hence why the dump area is remote and non overlapping circuits are flown.

Has this ever happened? I've heard of the Pan Am Sikorsky S-42, but that was a bit different.

[Edited 2013-10-08 10:22:05]
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LH707330
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RE: How Dangerous Fuel Dumping Is For Area Population

Tue Oct 08, 2013 7:17 pm

Quoting winstonlegthigh (Reply 7):
Has this ever happened? I've heard of the Pan Am Sikorsky S-42, but that was a bit different.

Yeah, that one was due to the flaps being extended and a fuel/air eddy that eventually blew up.
 
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tjwgrr
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RE: How Dangerous Fuel Dumping Is For Area Population

Wed Oct 09, 2013 4:38 pm

I remember this incident back in 2010. CO 772 dumped fuel after a hydraulics issue occurred upon departing EWR for NRT:


http://news.blogs.cnn.com/2010/05/09...j-after-hydraulics-problem/?hpt=T2

Supposedly dumped fuel between 3000-5000' Residents complained of fuel smell. Here's the A.net thread:


CO Jet Makes Emergency Landing At EWR 5/9 (by ewrkid May 9 2010 in Civil Aviation)?threadid=4805323&searchid=4806065&s=co+777+dumping+fuel#ID4806065

YouTube video:

http://www.youtube.com/watch?v=XORgDkaV_xk&hd=1
Direct KNOBS, maintain 2700' until established on the localizer, cleared ILS runway 26 left approach.
 
KELPkid
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RE: How Dangerous Fuel Dumping Is For Area Population

Wed Oct 09, 2013 9:06 pm

Quoting tjwgrr (Reply 9):
Supposedly dumped fuel between 3000-5000' Residents complained of fuel smell. Here's the A.net thread:

In New Jersey? Nahhhh...  

Yes, it would probably vaporize before hitting the ground. And raw jet fuel smells rather foul   
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sccutler
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RE: How Dangerous Fuel Dumping Is For Area Population

Thu Oct 10, 2013 3:15 am

There's a nut-job in Sedona, Arizona who is convinced that bizjets always dump fuel before landing. Clearly, she has not checked on what the fuel costs!

Read it and laugh - or, weep at the knowledge that people this nutty still live among us, and they breed!

http://www.closetheairport.com/
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Starlionblue
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RE: How Dangerous Fuel Dumping Is For Area Population

Thu Oct 10, 2013 4:25 am

Quoting sccutler (Reply 11):

There's a nut-job in Sedona, Arizona who is convinced that bizjets always dump fuel before landing. Clearly, she has not checked on what the fuel costs!

This belief is unfortunately more common than we would like to think. A friend of mine once heard a guy one a plane explaining condensation on top of the wing with, "that's just the pilots dumping fuel before landing".

Cue the chemtrail nuts...

[Edited 2013-10-09 21:29:50]
"There are no stupid questions, but there are a lot of inquisitive idiots." - John Ringo

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