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pilotaydin
Topic Author
Posts: 2100
Joined: Tue Sep 07, 2004 12:30 am

Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 4:19 am

Does the fluid from de icing have any effect on the metal texture after a while? does it cause any form or wear or corrosion, or chipping?

And if the fluid makes it into the flap drive motor areas, or actuators, or the spoiler actuators and mechanical components, what kind of effect does it have, if any?

thanks

ayd
The only time there is too much fuel onboard, is when you're on fire!
 
dl757md
Posts: 1483
Joined: Mon May 24, 2004 9:32 am

RE: Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 5:09 am

I don't have any hard data to support it, but my observation has been that in regard to the metal there is no effect. With respect to components I haven't seen any problems. I have seen faulty wiring that while not caused by the de-ice fluid has been discovered because of it causing a short to ground due to poor insulation. The only other damage I've seen was on a 767-400 raked wingtip that was damaged by the impact of the jet of fluid from the de-ice truck.

Dl757Md
757 Most beautiful airliner in the sky!
 
air2gxs
Posts: 1443
Joined: Mon Jun 18, 2001 1:29 pm

RE: Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 5:51 am

We have found that fluid enters component connectors and can cause problems over time. We are currently in the process of changing all the yaw damp servo connectors on our B757/B767 fleets due to reliability issues traced back to glycol contamination.

Another issue is that an overly agressive approach to ice removal may in fact wash lubricant away the affected areas.
 
amtrosie
Posts: 273
Joined: Thu Jan 06, 2005 6:44 am

RE: Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 9:41 am

Air2gxs;
In previous lifetimes (former employers) we had to caution the de-icing personel against direct spray at gear components and flight control hinge points. It seems that the fluid was under high enough pressure to force out the lubricating grease. As has been stated, electrical connectors often fell victim to the fluid. All in a days work.....
 
UAL Bagsmasher
Posts: 1839
Joined: Wed Sep 08, 1999 12:52 pm

RE: Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 10:08 am

We have had flap BPSU's take a crap due to being glycol soaked.
 
airplay
Posts: 3369
Joined: Sat Oct 25, 2003 1:58 am

RE: Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 12:54 pm

It makes the whole airplane stink...even months later after several washes it has that glycol stench.
 
troubleshooter
Posts: 420
Joined: Mon Feb 07, 2005 5:22 am

RE: Effect Of De/Anti-ICE Fluids On Wing Components

Mon Feb 21, 2005 5:40 pm

On aircrafts with fully mechanical operated flight controls, there is a risk of a flight control surface jam after treatment with de-icing fluid. This can happen, if fluid residues remain in the small gaps between the surface and the control flap wich is moved by the pilots. At higher altitudes the fluid residues in combination with humidity can freeze and block the tabs. On the BAe146/RJ for example, the elevators and ailerons are affected. We have to inspect and clean these flight controls after a certain time, if the aircraft has received a de-icing treatment with fluid II or IV.

As you can not clearly identify dry residues, you have to spray some warm water on the surfaces. Then wait approx. ten minutes. De-Icing residues will form a gel in combination with water. They consist of a thickening agent wich remains after all glycol is evaporated. If something was found, you have to carefully clean everything before releasing the aircraft to service.
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