Page 1 of 1

How do passenger windows get so scratched up?

Posted: Tue Feb 16, 2021 8:35 pm
by L1011TheTriStar
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

Re: How do passenger windows get so scratched up?

Posted: Wed Feb 17, 2021 1:22 am
by fr8mech
Crazing is common.

Environmental conditions can also cause mechanical damage. Age/UV damage. Cleaning crews.

Re: How do passenger windows get so scratched up?

Posted: Wed Feb 17, 2021 6:37 am
by unimproved
Sand and dirt hitting it at high speed. Paint also starts stripping from rivet heads and panel edges due to that.

Re: How do passenger windows get so scratched up?

Posted: Wed Feb 17, 2021 10:54 am
by Wacker1000
Minimum wage contract cleaners that don't know or care to follow proper procedures.

Re: How do passenger windows get so scratched up?

Posted: Wed Feb 17, 2021 11:45 am
by 787SIN
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.

Re: How do passenger windows get so scratched up?

Posted: Wed Feb 17, 2021 7:03 pm
by Strebav8or
Gremlin on the outside of the aircraft?

Re: How do passenger windows get so scratched up?

Posted: Thu Feb 18, 2021 3:28 am
by 77west
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.

Re: How do passenger windows get so scratched up?

Posted: Thu Feb 18, 2021 4:30 am
by battlegroup62
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.