ybacpa
Topic Author
Posts: 1080
Joined: Thu Mar 01, 2001 5:39 am

Deicing Fluid Color, EWR Deicer Question

Wed Apr 09, 2003 12:27 am

Yesterday (April 7), on my flight to Houston (CO 51), due to the unexpected snow in the New York area, we had to do a deicing. One thing I noticed during the deicing was it appeared that when the fluid was sprayed onto a plane (both the wing of mine, and some of the others in the immediate area), it appeared to change to a dark pink / red upon contact with the fuselage / wing. From what I could tell this occured near areas where ice or snow were present.

So, for my question: Does deicing fluid actually change color to indicate the presence of ice, or was this just some sort of optical illusion, or unrelated side effect?

Also, Newark has an open air hanger that was originally built to deice aircraft, but it doesn't appear that it is ever in use when deicing is necessary. Does anyone know if it is ever used, or why it is no longer used?

Thanks in advance for any information.
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744rules
Posts: 391
Joined: Sat Mar 30, 2002 3:34 am

RE: Deicing Fluid Color, EWR Deicer Question

Wed Apr 09, 2003 2:55 am

If I recall well, de-icing fluid type IV is blue, si the guy doing the the de-icing knows what parts have been done
 
NKP S2
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RE: Deicing Fluid Color, EWR Deicer Question

Wed Apr 09, 2003 5:09 am

De-icing/anti -ice fluid, "Type 1" ( propylene glycol ) is pink-ish and sprayed on hot...and is used for ice removal and nominal anti-ice capability.

Anti-ice fluid Type 4, ( if used ) is slime green and sprayed on at relative ambient temperatures ( although heat transfer from the adjacent Type 1 tank in the truck will probably raise this temp via osmosis ), and is used ONLY for anti-icing. It greatly increases hold-over times while precipitation is present.
 
Unique
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Joined: Fri Mar 14, 2003 12:48 am

RE: Deicing Fluid Color, EWR Deicer Question

Wed Apr 09, 2003 5:39 pm

NKP S2, couldn't have said it better!  Big thumbs up
We are presently deicing aircraft at ZRH due to snow showers on and off...

At ZRH, Type 1 is also pink-ish (looks like rusty) while Type 4 is greenish, too.

Cheers
 
ndege
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Joined: Thu Mar 06, 2003 1:23 pm

RE: Deicing Fluid Color, EWR Deicer Question

Thu Apr 10, 2003 5:57 pm

What determines which type is used and where?

BL
 
Unique
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RE: Deicing Fluid Color, EWR Deicer Question

Fri Apr 11, 2003 12:47 am

The temperature as well as if there is precipitation is the key factor to decide.

Cheers
 
NKP S2
Posts: 1665
Joined: Mon Dec 20, 1999 3:16 am

RE: Deicing Fluid Color, EWR Deicer Question

Fri Apr 11, 2003 6:56 am

Temperature will decide which glycol/water mix will be used for anti/de-icing ratio of Type 1. Anywhere from 10/90 to a maximum of 60/40.

Type 4, since it is shot at 100%, is generally used only when there is precipitation that would unduly shorten hold-over times...and only on wings and horizontal stabs. I say "generally" due to the fact some use it as a preventive measure on A/C parked overnight where precipitation is forcast...apply it to a clean A/C so that it makes an easier job of de-icing later, or the next day/morning before it flies again. It can really help: A plane sittiing, cold soaked, in blowing, freezing rain for hours and hours can really get some thick ice on it, and can take a full 30 minutes or more to de-ice...using up a sh!tload of Type 1.
 
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STT757
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RE: Deicing Fluid Color, EWR Deicer Question

Sun Apr 13, 2003 5:59 am

The de-icing tent CO built at EWR is only a year or two old, my flight to Cancun (737-900) last year taxied through there.

We went in there for about 8 -10 minutes, then departed.

The tent can only handle aircraft up to the size of a 737-900, so maybe your plane was a 767?
Eastern Air lines flt # 701, EWR-MCO Boeing 757
 
TERRA
Posts: 208
Joined: Wed Aug 18, 1999 2:37 am

RE: Deicing Fluid Color, EWR Deicer Question

Fri Apr 18, 2003 2:03 am

No one has mentioned Type II which is normally yellow!
 
ybacpa
Topic Author
Posts: 1080
Joined: Thu Mar 01, 2001 5:39 am

RE: Deicing Fluid Color, EWR Deicer Question

Sat Apr 19, 2003 8:11 am

The tent can only handle aircraft up to the size of a 737-900, so maybe your plane was a 767?

Actually the equipment was a 777. Regardless, it still wasn't in use that night, even for the 73x's being deiced; everything was taxing right out to the deicing area.
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