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L1011TheTriStar
Topic Author
Posts: 2
Joined: Sat Mar 14, 2020 2:21 am

How do passenger windows get so scratched up?

Tue Feb 16, 2021 8:35 pm

I've noticed when flying on older 757s and other 20+ year old aircraft, some of the passenger windows seem quite scratched up on the outer pane. I'm curious how this happens?

I know it can't be from passenger traffic because the scratches are almost never on the inner plastic window pane we all can touch from the passenger cabin.

Here is an example of what i'm talking about

https://i.imgur.com/xNPZDxR.png
 
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fr8mech
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Re: How do passenger windows get so scratched up?

Wed Feb 17, 2021 1:22 am

Crazing is common.

Environmental conditions can also cause mechanical damage. Age/UV damage. Cleaning crews.
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unimproved
Posts: 258
Joined: Sun Jun 22, 2014 7:14 pm

Re: How do passenger windows get so scratched up?

Wed Feb 17, 2021 6:37 am

Sand and dirt hitting it at high speed. Paint also starts stripping from rivet heads and panel edges due to that.
 
Wacker1000
Posts: 274
Joined: Tue Jan 07, 2014 6:36 pm

Re: How do passenger windows get so scratched up?

Wed Feb 17, 2021 10:54 am

Minimum wage contract cleaners that don't know or care to follow proper procedures.
 
787SIN
Posts: 84
Joined: Thu Mar 09, 2017 6:00 am

Re: How do passenger windows get so scratched up?

Wed Feb 17, 2021 11:45 am

As fre8mech says, if on the outside its most probably crazing. Generally acceptable to a point then the glazing panel has to be changed. Check the depth of the defects with optical micrometer.

Inside, pax and cleaners using the incorrect methods on the inner panes.
 
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Strebav8or
Posts: 23
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Re: How do passenger windows get so scratched up?

Wed Feb 17, 2021 7:03 pm

Gremlin on the outside of the aircraft?
 
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77west
Posts: 981
Joined: Sat Jun 13, 2009 11:52 am

Re: How do passenger windows get so scratched up?

Thu Feb 18, 2021 3:28 am

In 2019 I flew on the last 737-300 off the line and the windows in the first few rows all seemed to have the 1998 date stamped on them from when the plane was built. They had a few scratches but didnt seem too bad considering.
77West - AW109S - BE90 - JS31 - B1900 - Q300 - ATR72 - DC9-30 - MD80 - B733 - A320 - B738 - A300-B4 - B773 - B77W
 
battlegroup62
Posts: 62
Joined: Mon Jul 03, 2017 5:05 am

Re: How do passenger windows get so scratched up?

Thu Feb 18, 2021 4:30 am

787SIN wrote:
As fre8mech says, if on the outside its most probably crazing. Generally acceptable to a point then the glazing panel has to be changed. Check the depth of the defects with optical micrometer.

Inside, pax and cleaners using the incorrect methods on the inner panes.


Outside too. That's what happens when the cleaners drop the rag on the tarmac, pick it up, and use it on windows anyway.
We have to keep planes airworthy. That doesn't mean they have to fly.

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