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Hello everyone,

Do you think we should turn the NESA heat OFF after having a cracked window in a C130J ? the -1 docs doesn't say any thing about this subject!

all it says "If a window is found to be arcing, the NESA system should be turned off. The intense local heating at the spot where the arcing occurs can cause the window to delaminate and crack. The longer arcing occurs, the more opportunity there is for damage to occur."

Thanks!!

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The heat keeps the window flexible.   From what I understood, you keep heat on unless it's arcing to keep the window flexible and not shatter

I'll read around my pubs and manuals and see if anything addresses a crack and what to do

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https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.lockheedmartin.com/content/dam/lockheed-martin/aero/documents/sustainment/csc/service-news/sn-mag-v11-v20/V19N3.pdf&ved=2ahUKEwiXkpqhkYDsAhWPqZ4KHZLBD7kQFjAAegQIEBAC&usg=AOvVaw2phgJef06Y2lZ2x121EmRP

This is older and I wouldn't go operating an aircraft off of this but to be honest the windows havent really changed that much and this information should at least give you something "official" from lockheed to start having a conversation with your stan/eval.

It talks about cracks in flight.  It's what I thought, keeping the window heated is safer than letting it get cold and brittle.

Arcing is really only reason I can think to 100% turn it off.

 

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