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O2 filling



 
 
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  #1  
Old November 15th 07, 12:31 PM posted to rec.aviation.piloting
Ron Natalie
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Posts: 1,175
Default O2 filling

Robert M. Gary wrote:
With FBOs now charging $50-$100 to fill a tank I've started calling
around to see where else I can get O2 in the Sacramento area.


The regional oxygen company (Roberts Oxygen) it he DC area primarily
handles the welding market with a secondary market for the medical
arena. My local office (just north of Dulles airport) doesn't fill
O2 bottles of any sort, just exchange them. The plant over by
GAI fills them. I can take my cylinder to the local office and they
will send it over to be filled and back (two day turn around).

Call around.

The only real difference to them as to welders/medical/diving/ABO is what
paper they give you back with the bottle. The O2 is all the same.
Cryogenic separation and the fact you don't want to screw around
with high pressure O2 in general means they treat them all to a
common high standard.
  #2  
Old November 16th 07, 03:05 AM posted to rec.aviation.piloting
Airbus[_2_]
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Posts: 15
Default O2 filling

A bit O.T. :
I read an accident report a few years back - an FBO in Europe re-filled an
O2 bottle with compressed air. In the ensuing high-altitude flight, the
pilot lost conciousness and the airplane crashed in the mountains. A
passenger, miraculously, survived and confirmed the cause of the crash due
to the pilot's unconciousness.

What I've wondered ever since I read it :
What would the FBO be doing with compressed air in the first place, and how
could this confusion occur? What *could* they have been thinking?

  #3  
Old November 15th 07, 06:35 PM posted to rec.aviation.piloting
Dave S
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Posts: 406
Default O2 filling

Airbus wrote:
A bit O.T. :
I read an accident report a few years back - an FBO in Europe re-filled an
O2 bottle with compressed air. In the ensuing high-altitude flight, the
pilot lost conciousness and the airplane crashed in the mountains. A
passenger, miraculously, survived and confirmed the cause of the crash due
to the pilot's unconciousness.

What I've wondered ever since I read it :
What would the FBO be doing with compressed air in the first place, and how
could this confusion occur? What *could* they have been thinking?


This would be complete negligence had this happened in the US - with the
standards in place.

The fittings in the US are spec'd by the Compressed Gas Association
(CGA) for different gasses and gas mixes. Oxygen gets a different
fitting than Compressed Breathing Air, which gets different fittings
than Argon, Nitrogen, CO2.. etc.

The only way this could have happened is if 1) the oxygen tanks were
mis-filled with air at the vendor (an adapter would have been needed) or
2) someone adapted an air bottle to an oxygen fitting.

When the threads or the nipple dont line up properly, its a big red flag.
  #5  
Old November 16th 07, 02:15 AM posted to rec.aviation.piloting
Robert M. Gary
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Posts: 2,767
Default O2 filling

On Nov 15, 7:05 pm, Airbus wrote:
A bit O.T. :
I read an accident report a few years back - an FBO in Europe re-filled an
O2 bottle with compressed air. In the ensuing high-altitude flight, the
pilot lost conciousness and the airplane crashed in the mountains. A
passenger, miraculously, survived and confirmed the cause of the crash due
to the pilot's unconciousness.

What I've wondered ever since I read it :
What would the FBO be doing with compressed air in the first place, and how
could this confusion occur? What *could* they have been thinking?


They use compressed air to drive all their tools in the shop.

-Robert
  #7  
Old November 16th 07, 06:50 PM posted to rec.aviation.piloting
Jim Stewart
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Posts: 437
Default O2 filling

Airbus wrote:
In article ,
says...

On Nov 15, 7:05 pm, Airbus wrote:
A bit O.T. :
I read an accident report a few years back - an FBO in Europe re-filled an
O2 bottle with compressed air. In the ensuing high-altitude flight, the
pilot lost conciousness and the airplane crashed in the mountains. A
passenger, miraculously, survived and confirmed the cause of the crash due
to the pilot's unconciousness.

What I've wondered ever since I read it :
What would the FBO be doing with compressed air in the first place, and how
could this confusion occur? What *could* they have been thinking?

They use compressed air to drive all their tools in the shop.



Sure - but to get air from their shop compressor into an O2 bottle would
require some real ingenuity. Anyone smart enough to do that would be smart
enough not to do it, I should think!

I'm wondering - maybe the FBO didn't have O2 facilities, and some gopher went
out to a local diving supplies shop, and together they managed to jury-rig the
fittings . . .


Not to mention getting the 125 psi
shop air up to about 2500 psi to fill
the bottle...

It is puzzling. In the US, about the
only thing bottled air is used for is
firefighters' air bottles, scuba diving
bottles and breathing air for working
in hazardous atmospheres. I'd suspect
one of these three sources.


  #8  
Old November 18th 07, 02:01 PM posted to rec.aviation.piloting
Dave[_5_]
external usenet poster
 
Posts: 186
Default O2 filling

On Nov 16, 9:56 am, Airbus wrote:
In article ,
says...







On Nov 15, 7:05 pm, Airbus wrote:
A bit O.T. :
I read an accident report a few years back - an FBO in Europe re-filled an
O2 bottle with compressed air. In the ensuing high-altitude flight, the
pilot lost conciousness and the airplane crashed in the mountains. A
passenger, miraculously, survived and confirmed the cause of the crash due
to the pilot's unconciousness.


What I've wondered ever since I read it :
What would the FBO be doing with compressed air in the first place, and how
could this confusion occur? What *could* they have been thinking?


They use compressed air to drive all their tools in the shop.


Sure - but to get air from their shop compressor into an O2 bottle would
require some real ingenuity. Anyone smart enough to do that would be smart
enough not to do it, I should think!

I'm wondering - maybe the FBO didn't have O2 facilities, and some gopher went
out to a local diving supplies shop, and together they managed to jury-rig the
fittings . . .- Hide quoted text -

- Show quoted text -


The fittings for "Transfilling" from a larger tank are readily
available. Just do a search for "Oxygen Cylinder Fill Adapter". Here
is an example:http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?
ViewItem&item=160164819619&ssPageName=MERC_VI_RCRX _Pr4_PcY_BIN_Stores_IT&refitem=160180462292&itemco unt=4&refwidgetloc=active_view_item&usedrule1=Cros sSell_LogicX&refwidgettype=cross_promot_widget

Sorry for the long link.

David Johnson
  #9  
Old November 19th 07, 06:28 PM posted to rec.aviation.piloting
gwengler
external usenet poster
 
Posts: 49
Default O2 filling

On Nov 15, 10:05 pm, Airbus wrote:
A bit O.T. :
I read an accident report a few years back - an FBO in Europe re-filled an
O2 bottle with compressed air. In the ensuing high-altitude flight, the
pilot lost conciousness and the airplane crashed in the mountains. A
passenger, miraculously, survived and confirmed the cause of the crash due
to the pilot's unconciousness.

What I've wondered ever since I read it :
What would the FBO be doing with compressed air in the first place, and how
could this confusion occur? What *could* they have been thinking?


I think you mean this one: NTSB IAD97FA060
http://www.ntsb.gov/ntsb/brief.asp?e...08X07722&key=1 . It
was a T337 and happened in the US.

Gerd
 




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